0001097519cfst:S000010802Member2012-07-022013-07-010001097519cfst:S000010802Membercfst:C000029895Member2012-07-022013-07-010001097519cfst:S000010802Membercfst:C000029896Member2012-07-022013-07-010001097519cfst:S000010802Membercfst:C000029897Member2012-07-022013-07-010001097519cfst:S000010802Membercfst:C000094653Member2012-07-022013-07-010001097519cfst:S000010802Membercfst:C000094654Member2012-07-022013-07-010001097519cfst:S000010802Membercfst:C000122588Member2012-07-022013-07-010001097519cfst:S000010802Membercfst:C000122589Member2012-07-022013-07-010001097519cfst:S000010802Membercfst:C000029898Member2012-07-022013-07-010001097519cfst:S000010802Memberrr:AfterTaxesOnDistributionsMembercfst:C000029895Member2012-07-022013-07-010001097519cfst:S000010802Memberrr:AfterTaxesOnDistributionsAndSalesMembercfst:C000029895Member2012-07-022013-07-010001097519cfst:S000010802Membercfst:MsciEafeValueIndexMember2012-07-022013-07-010001097519cfst:S000021046Member2012-07-022013-07-010001097519cfst:S000021046Membercfst:C000121784Member2012-07-022013-07-010001097519cfst:S000021046Membercfst:C000059844Member2012-07-022013-07-010001097519cfst:S000021046Membercfst:C000059843Member2012-07-022013-07-010001097519cfst:S000021046Membercfst:C000059846Member2012-07-022013-07-010001097519cfst:S000021046Membercfst:C000101817Member2012-07-022013-07-010001097519cfst:S000021046Membercfst:C000121785Member2012-07-022013-07-010001097519cfst:S000021046Membercfst:C000059845Member2012-07-022013-07-010001097519cfst:S000021046Membercfst:C000101818Member2012-07-022013-07-010001097519cfst:S000021046Memberrr:AfterTaxesOnDistributionsMembercfst:C000059846Member2012-07-022013-07-010001097519cfst:S000021046Memberrr:AfterTaxesOnDistributionsAndSalesMembercfst:C000059846Member2012-07-022013-07-010001097519cfst:S000021046Membercfst:MsciEafeValueIndexMember2012-07-022013-07-010001097519cfst:S000010789Member2012-07-022013-07-010001097519cfst:S000010795Member2012-07-022013-07-010001097519cfst:S000010795Membercfst:C000029865Member2012-07-022013-07-010001097519cfst:S000010795Membercfst:C000029866Member2012-07-022013-07-010001097519cfst:S000010795Membercfst:C000029867Member2012-07-022013-07-010001097519cfst:S000010795Membercfst:C000094650Member2012-07-022013-07-010001097519cfst:S000010795Membercfst:C000122583Member2012-07-022013-07-010001097519cfst:S000010795Membercfst:C000094651Member2012-07-022013-07-010001097519cfst:S000010795Membercfst:C000029868Member2012-07-022013-07-010001097519cfst:S000010789Membercfst:C000029837Member2012-07-022013-07-010001097519cfst:S000010789Membercfst:C000029838Member2012-07-022013-07-010001097519cfst:S000010789Membercfst:C000029839Member2012-07-022013-07-010001097519cfst:S000010789Membercfst:C000094641Member2012-07-022013-07-010001097519cfst:S000010789Membercfst:C000109944Member2012-07-022013-07-010001097519cfst:S000010789Membercfst:C000122574Member2012-07-022013-07-010001097519cfst:S000010789Membercfst:C000122575Member2012-07-022013-07-010001097519cfst:S000010789Membercfst:C000109945Member2012-07-022013-07-010001097519cfst:S000010789Membercfst:C000029840Member2012-07-022013-07-0100010975192012-07-022013-07-010001097519cfst:S000010795Memberrr:AfterTaxesOnDistributionsMembercfst:C000029865Member2012-07-022013-07-010001097519cfst:S000010795Memberrr:AfterTaxesOnDistributionsAndSalesMembercfst:C000029865Member2012-07-022013-07-010001097519cfst:S000010795Membercfst:SandPFiveHundredIndexMember2012-07-022013-07-010001097519cfst:S000010799Membercfst:C000029883Member2012-07-022013-07-010001097519cfst:S000010799Membercfst:C000029884Member2012-07-022013-07-010001097519cfst:S000010799Membercfst:C000029885Member2012-07-022013-07-010001097519cfst:S000010799Membercfst:C000029882Member2012-07-022013-07-010001097519cfst:S000010799Membercfst:C000122587Member2012-07-022013-07-010001097519cfst:S000010799Membercfst:C000029886Member2012-07-022013-07-010001097519cfst:S000010789Memberrr:AfterTaxesOnDistributionsMembercfst:C000029837Member2012-07-022013-07-010001097519cfst:S000010789Memberrr:AfterTaxesOnDistributionsAndSalesMembercfst:C000029837Member2012-07-022013-07-010001097519cfst:S000010789Membercfst:BofaMerrillLynchAllConvertiblesAllQualitiesIndexMember2012-07-022013-07-010001097519cfst:S000010799Memberrr:AfterTaxesOnDistributionsMembercfst:C000029882Member2012-07-022013-07-010001097519cfst:S000010799Memberrr:AfterTaxesOnDistributionsAndSalesMembercfst:C000029882Member2012-07-022013-07-010001097519cfst:S000010799Membercfst:RussellThreeThousandIndexMember2012-07-022013-07-010001097519cfst:S000010799Member2012-07-022013-07-010001097519cfst:S000022025Member2012-07-022013-07-010001097519cfst:S000022025Membercfst:C000063263Member2012-07-022013-07-010001097519cfst:S000022025Membercfst:C000063264Member2012-07-022013-07-010001097519cfst:S000022025Membercfst:C000063265Member2012-07-022013-07-010001097519cfst:S000022025Membercfst:C000063266Member2012-07-022013-07-010001097519cfst:S000010794Membercfst:C000029860Member2012-07-022013-07-010001097519cfst:S000010794Membercfst:C000029861Member2012-07-022013-07-010001097519cfst:S000010794Membercfst:C000029862Member2012-07-022013-07-010001097519cfst:S000010794Membercfst:C000094648Member2012-07-022013-07-010001097519cfst:S000010794Membercfst:C000029863Member2012-07-022013-07-010001097519cfst:S000010794Membercfst:C000122581Member2012-07-022013-07-010001097519cfst:S000010794Membercfst:C000122582Member2012-07-022013-07-010001097519cfst:S000010794Membercfst:C000094649Member2012-07-022013-07-010001097519cfst:S000010794Membercfst:C000029864Member2012-07-022013-07-010001097519cfst:S000010826Member2012-07-022013-07-010001097519cfst:S000010804Member2012-07-022013-07-010001097519cfst:S000010826Membercfst:C000030054Member2012-07-022013-07-010001097519cfst:S000010826Membercfst:C000094660Member2012-07-022013-07-010001097519cfst:S000010826Membercfst:C000122594Member2012-07-022013-07-010001097519cfst:S000010826Membercfst:C000030055Member2012-07-022013-07-010001097519cfst:S000010794Member2012-07-022013-07-010001097519cfst:S000010804Membercfst:C000029904Member2012-07-022013-07-010001097519cfst:S000010804Membercfst:C000029905Member2012-07-022013-07-010001097519cfst:S000010804Membercfst:C000029906Member2012-07-022013-07-010001097519cfst:S000010804Membercfst:C000094658Member2012-07-022013-07-010001097519cfst:S000010804Membercfst:C000029907Member2012-07-022013-07-010001097519cfst:S000010804Membercfst:C000122592Member2012-07-022013-07-010001097519cfst:S000010804Membercfst:C000029908Member2012-07-022013-07-010001097519cfst:S000010797Membercfst:C000029874Member2012-07-022013-07-010001097519cfst:S000010797Membercfst:C000029875Member2012-07-022013-07-010001097519cfst:S000010797Membercfst:C000029876Member2012-07-022013-07-010001097519cfst:S000010797Membercfst:C000094652Member2012-07-022013-07-010001097519cfst:S000010797Membercfst:C000122586Member2012-07-022013-07-010001097519cfst:S000010797Membercfst:C000029877Member2012-07-022013-07-010001097519cfst:S000010797Memberrr:AfterTaxesOnDistributionsMembercfst:C000029874Member2012-07-022013-07-010001097519cfst:S000010797Memberrr:AfterTaxesOnDistributionsAndSalesMembercfst:C000029874Member2012-07-022013-07-010001097519cfst:S000010797Membercfst:SandPFiveHundredIndexMember2012-07-022013-07-010001097519cfst:S000022025Memberrr:AfterTaxesOnDistributionsAndSalesMembercfst:C000063263Member2012-07-022013-07-010001097519cfst:S000022025Memberrr:AfterTaxesOnDistributionsMembercfst:C000063263Member2012-07-022013-07-010001097519cfst:S000022025Membercfst:MsciAllCountryWorldIndexMember2012-07-022013-07-010001097519cfst:S000010794Memberrr:AfterTaxesOnDistributionsMembercfst:C000029860Member2012-07-022013-07-010001097519cfst:S000010794Memberrr:AfterTaxesOnDistributionsAndSalesMembercfst:C000029860Member2012-07-022013-07-010001097519cfst:S000010794Membercfst:SandPFiveHundredIndexMember2012-07-022013-07-010001097519cfst:S000010797Member2012-07-022013-07-010001097519cfst:S000010825Member2012-07-022013-07-010001097519cfst:S000010825Membercfst:C000030051Member2012-07-022013-07-010001097519cfst:S000010825Membercfst:C000030052Member2012-07-022013-07-010001097519cfst:S000010825Membercfst:C000109947Member2012-07-022013-07-010001097519cfst:S000010825Membercfst:C000122593Member2012-07-022013-07-010001097519cfst:S000010825Membercfst:C000030053Member2012-07-022013-07-010001097519cfst:S000010818Member2012-07-022013-07-010001097519cfst:S000010818Membercfst:C000030031Member2012-07-022013-07-010001097519cfst:S000010818Membercfst:C000094659Member2012-07-022013-07-010001097519cfst:S000010818Membercfst:C000030032Member2012-07-022013-07-010001097519cfst:S000010818Membercfst:C000079027Member2012-07-022013-07-010001097519cfst:S000010818Membercfst:C000030033Member2012-07-022013-07-010001097519cfst:S000010818Memberrr:AfterTaxesOnDistributionsMembercfst:C000030031Member2012-07-022013-07-010001097519cfst:S000010818Memberrr:AfterTaxesOnDistributionsAndSalesMembercfst:C000030031Member2012-07-022013-07-010001097519cfst:S000010818Membercfst:SandPFiveHundredIndexMember2012-07-022013-07-010001097519cfst:S000010825Memberrr:AfterTaxesOnDistributionsMembercfst:C000030051Member2012-07-022013-07-010001097519cfst:S000010825Memberrr:AfterTaxesOnDistributionsAndSalesMembercfst:C000030051Member2012-07-022013-07-010001097519cfst:S000010825Membercfst:SandPFiveHundredIndexMember2012-07-022013-07-010001097519cfst:S000010803Member2012-07-022013-07-010001097519cfst:S000010827Member2012-07-022013-07-010001097519cfst:S000010803Membercfst:C000029899Member2012-07-022013-07-010001097519cfst:S000010803Membercfst:C000029900Member2012-07-022013-07-010001097519cfst:S000010803Membercfst:C000029901Member2012-07-022013-07-010001097519cfst:S000010803Membercfst:C000094655Member2012-07-022013-07-010001097519cfst:S000010803Membercfst:C000094656Member2012-07-022013-07-010001097519cfst:S000010803Membercfst:C000029902Member2012-07-022013-07-010001097519cfst:S000010803Membercfst:C000122590Member2012-07-022013-07-010001097519cfst:S000010803Membercfst:C000122591Member2012-07-022013-07-010001097519cfst:S000010803Membercfst:C000094657Member2012-07-022013-07-010001097519cfst:S000010803Membercfst:C000097721Member2012-07-022013-07-010001097519cfst:S000010827Membercfst:C000097722Member2012-07-022013-07-010001097519cfst:S000010803Membercfst:C000029903Member2012-07-022013-07-010001097519cfst:S000010827Membercfst:C000030056Member2012-07-022013-07-010001097519cfst:S000010827Membercfst:C000097723Member2012-07-022013-07-010001097519cfst:S000010827Membercfst:C000109948Member2012-07-022013-07-010001097519cfst:S000010827Membercfst:C000122595Member2012-07-022013-07-010001097519cfst:S000010827Membercfst:C000030057Member2012-07-022013-07-010001097519cfst:S000010804Memberrr:AfterTaxesOnDistributionsMembercfst:C000029904Member2012-07-022013-07-010001097519cfst:S000010804Memberrr:AfterTaxesOnDistributionsAndSalesMembercfst:C000029904Member2012-07-022013-07-010001097519cfst:S000010804Membercfst:MsciEafeIndexMember2012-07-022013-07-010001097519cfst:S000010826Membercfst:SAndPMidcapFourHundredIndexMember2012-07-022013-07-010001097519cfst:S000010827Memberrr:AfterTaxesOnDistributionsMembercfst:C000030056Member2012-07-022013-07-010001097519cfst:S000010827Memberrr:AfterTaxesOnDistributionsAndSalesMembercfst:C000030056Member2012-07-022013-07-010001097519cfst:S000010827Membercfst:SandpSmallcapSixHundredIndexMember2012-07-022013-07-010001097519cfst:S000010793Membercfst:C000029855Member2012-07-022013-07-010001097519cfst:S000010793Membercfst:C000029856Member2012-07-022013-07-010001097519cfst:S000010793Membercfst:C000029857Member2012-07-022013-07-010001097519cfst:S000010793Membercfst:C000094647Member2012-07-022013-07-010001097519cfst:S000010793Membercfst:C000029858Member2012-07-022013-07-010001097519cfst:S000010793Membercfst:C000122578Member2012-07-022013-07-010001097519cfst:S000010793Membercfst:C000122579Member2012-07-022013-07-010001097519cfst:S000010793Membercfst:C000122580Member2012-07-022013-07-010001097519cfst:S000010793Membercfst:C000029859Member2012-07-022013-07-010001097519cfst:S000010793Memberrr:AfterTaxesOnDistributionsMembercfst:C000029855Member2012-07-022013-07-010001097519cfst:S000010793Memberrr:AfterTaxesOnDistributionsAndSalesMembercfst:C000029855Member2012-07-022013-07-010001097519cfst:S000010793Membercfst:RussellTwoThousandValueIndexMember2012-07-022013-07-010001097519cfst:S000010792Member2012-07-022013-07-010001097519cfst:S000010792Membercfst:C000029850Member2012-07-022013-07-010001097519cfst:S000010792Membercfst:C000029852Member2012-07-022013-07-010001097519cfst:S000010792Membercfst:C000029851Member2012-07-022013-07-010001097519cfst:S000010826Memberrr:AfterTaxesOnDistributionsMembercfst:C000030054Member2012-07-022013-07-010001097519cfst:S000010826Memberrr:AfterTaxesOnDistributionsAndSalesMembercfst:C000030054Member2012-07-022013-07-010001097519cfst:S000010792Membercfst:C000094644Member2012-07-022013-07-010001097519cfst:S000010792Membercfst:C000094645Member2012-07-022013-07-010001097519cfst:S000010792Membercfst:C000029853Member2012-07-022013-07-010001097519cfst:S000010792Membercfst:C000122576Member2012-07-022013-07-010001097519cfst:S000010792Membercfst:C000122577Member2012-07-022013-07-010001097519cfst:S000010792Membercfst:C000094646Member2012-07-022013-07-010001097519cfst:S000010792Membercfst:C000079026Member2012-07-022013-07-010001097519cfst:S000010792Membercfst:C000029854Member2012-07-022013-07-010001097519cfst:S000010803Memberrr:AfterTaxesOnDistributionsMembercfst:C000029899Member2012-07-022013-07-010001097519cfst:S000010803Memberrr:AfterTaxesOnDistributionsAndSalesMembercfst:C000029899Member2012-07-022013-07-010001097519cfst:S000010803Membercfst:MsciEafeIndexMember2012-07-022013-07-010001097519cfst:S000010792Memberrr:AfterTaxesOnDistributionsMembercfst:C000029850Member2012-07-022013-07-010001097519cfst:S000010792Memberrr:AfterTaxesOnDistributionsAndSalesMembercfst:C000029850Member2012-07-022013-07-010001097519cfst:S000010792Membercfst:RussellMidcapValueIndexMember2012-07-022013-07-010001097519cfst:S000010793Member2012-07-022013-07-01pureiso4217:USD<b>Summary of the Fund</b><b>Investment Objective</b>Columbia International Value Fund (the Fund) seeks long-term capital appreciation.<b>Fees and Expenses of the Fund</b>This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 19 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) under <b>Sales Charge Waivers</b> beginning on page S-1.You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 19 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) under <b>Sales Charge Waivers</b> beginning on page S-1.50000<b>Shareholder Fees (fees paid directly from your investment)</b><b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)</b><b>Example</b>The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example illustrates the hypothetical expenses that you would incur over the time periods indicated, and assumes that:<ul type="square"><li style="margin-left:-20px">you invest $10,000 in the applicable class of Fund shares for the periods indicated,</li></ul><ul type="square"><li style="margin-left:-20px">your investment has a 5% return each year, and</li></ul><ul type="square"><li style="margin-left:-20px">the Fund&#8217;s total annual operating expenses remain the same as shown in the Annual Fund Operating Expenses table above.</li></ul>Although your actual costs may be higher or lower, based on the assumptions listed above, your costs would be:<b>Portfolio Turnover</b>The Fund may pay transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 13% of the average value of its portfolio.<b>Principal Investment Strategies</b>The Fund invests all or substantially all of its assets in Columbia International Value Master Portfolio (the Master Portfolio). The Master Portfolio has the same investment objective as the Fund.<br/><br/>Under normal circumstances, the Master Portfolio invests at least 80% of total assets (including the amount of any borrowings for investment purposes) in equity securities of foreign companies that have market capitalizations of more than $1 billion at the time of purchase. The Master Portfolio typically invests in foreign companies in at least three countries, other than the United States, at any one time and may invest in emerging markets. The Master Portfolio may invest directly in foreign securities or indirectly through closed-end investment companies and depositary receipts.<br/><br/>The Master Portfolio may invest in currency forwards, futures and options for both hedging and non-hedging purposes, including, for example, to seek to enhance returns or, in certain unusual circumstances, when holding a derivative is deemed preferable to holding the underlying asset.<br/><br/>The Master Portfolio has the following limits on its investments, which are applied at the time an investment is made. The Master Portfolio:<ul type="square"><li style="margin-left:-20px">normally invests no more than 5% of its total assets in a single security;</li></ul><ul type="square"><li style="margin-left:-20px">typically invests up to the greater of (i) 20% of its total assets in a single country or industry or (ii) 150% of the weighting of a single country or industry in the MSCI Europe, Australasia, Far East (MSCI EAFE) Value Index (limited to less than 25% of its total assets in a single industry, other than U.S. Government obligations); and</li></ul><ul type="square"><li style="margin-left:-20px">generally may not invest more than 20% of its total assets in emerging markets.</li></ul>The investment manager combines fundamental and quantitative analysis with risk management in identifying value opportunities and constructing the Master Portfolio.<b>Principal Risks</b>An investment in the Fund involves risk, including those described below. There is no assurance that the Fund will achieve its investment objective and you may lose money. The value of the Fund&#8217;s holdings may decline, and the Fund&#8217;s net asset value (NAV) and Fund share price may go down.<br /><br /><b>Depositary Receipts Risks.</b> Depositary receipts are receipts issued by a bank or trust company and evidence of ownership of underlying securities issued by foreign companies. Some foreign securities are traded in the form of American Depositary Receipts (ADRs). Depositary receipts involve the risks of other investments in foreign securities, including risks associated with investing in the particular country, including the political, regulatory, economic, social and other conditions or events occurring in the country, as well as fluctuations in its currency. In addition, ADR holders may not have all the legal rights of shareholders and may experience difficulty in receiving shareholder communications. <br /><br /><b>Derivatives Risk.</b> Losses involving derivative instruments may be substantial, because a relatively small price movement in the underlying security(ies), instrument, commodity, currency or index may result in a substantial loss for the Fund. In addition to the potential for increased losses, the use of derivative instruments may lead to increased volatility within the Fund. Derivatives will typically increase the Fund&#8217;s exposure to principal risks to which it is otherwise exposed, and may expose the Fund to additional risks, including correlation risk, counterparty risk, hedging risk, leverage risk and liquidity risk. Below is more detailed information on certain derivatives expected to be utilized by the Fund.<br /><br /><b>Derivatives Risk/Forward Foreign Currency Contracts Risk.</b> These instruments are a type of derivative contract whereby the Fund may agree to buy or sell a country&#8217;s or region&#8217;s currency at a specific price on a specific date in the future. These contracts may fall in value due to foreign market downswings or foreign currency value fluctuations. The Fund&#8217;s investment or hedging strategies may not achieve their objective. Investment in these instruments also subjects the Fund to counterparty risk.<br /><br /><b>Derivatives Risk/Futures Contracts Risk.</b> The loss that may be incurred in entering into futures contracts may exceed the amount of the premium paid and may be potentially unlimited. Futures markets are highly volatile and the use of futures may increase the volatility of the Fund&#8217;s net asset value (NAV). Additionally, as a result of the low collateral deposits normally involved in futures trading, a relatively small price movement in a futures contract may result in substantial losses to the Fund. Futures contracts may be illiquid. Furthermore, exchanges may limit fluctuations in futures contract prices during a trading session by imposing a maximum permissible price movement on each futures contract. The Fund may be disadvantaged if it is prohibited from executing a trade outside the daily permissible price movement. Futures contracts executed on foreign exchanges may not provide the same protection as U.S. exchanges. These transactions involve additional risks, including counterparty risk, hedging risk and pricing risk.<br /><br /><b>Derivatives Risk/Options Risk.</b> If the Fund sells a put option, there is a risk that the Fund may be required to buy the underlying asset at a disadvantageous price. If the Fund sells a call option, there is a risk that the Fund may be required to sell the underlying asset at a disadvantageous price, and if the call option sold is not covered (for example, by owning the underlying asset), the Fund's losses are potentially unlimited. These transactions involve other risks, including counterparty risk and hedging risk.<br /><br /><b>Emerging Market Securities Risk.</b> Securities issued by foreign governments or companies in emerging market countries are more likely to have greater exposure to the risks of investing in foreign securities that are described in Foreign Securities Risk. In addition, emerging market countries are more likely to experience instability resulting, for example, from rapid changes or developments in social, political and economic conditions. Their economies are usually less mature and their securities markets are typically less developed with more limited trading activity (i.e., lower trading volumes and less liquidity) than more developed countries. Emerging market securities tend to be more volatile than securities in more developed markets. Many emerging market countries are heavily dependent on international trade and have fewer trading partners, which makes them more sensitive to world commodity prices and economic downturns in other countries, and some have a higher risk of currency devaluations.<br /><br /><b>Foreign Currency Risk.</b> The performance of the Fund may be materially affected positively or negatively by foreign currency strength or weakness relative to the U.S. dollar, particularly if the Fund invests a significant percentage of its assets in foreign securities or other assets denominated in currencies other than the U.S. dollar.<br /><br /><b>Foreign Securities Risk.</b> Investments in foreign securities involve certain risks not associated with investments in securities of U.S. companies. Foreign securities subject the Fund to the risks associated with investing in the particular country, including the political, regulatory, economic, social, diplomatic and other conditions or events occurring in the country or region, as well as fluctuations in its currency and the risks associated with less developed custody and settlement practices. Foreign securities may be more volatile and less liquid than investments in securities of U.S. companies.<br /><br /><b>Investing in Other Funds Risk.</b> The Fund&#8217;s investment in other funds (affiliated and/or unaffiliated funds, including exchange-traded funds (ETFs)) subjects the Fund to the investment performance (positive or negative) and risks of these underlying funds in direct proportion to the Fund&#8217;s investment therein. The performance of underlying funds could be adversely affected if other entities that invest in the same underlying funds make relatively large investments or redemptions in such underlying funds. The Fund, and its shareholders, indirectly bear a portion of the expenses of any funds in which the Fund invests. Because the expenses and costs of a fund are shared by its investors, redemptions by other investors in the fund could result in decreased economies of scale and increased operating expenses for such fund. The Investment Manager may have potential conflicts of interest in selecting affiliated underlying funds for investment by the Fund because the fees paid to it by some underlying funds are higher than the fees paid by other underlying funds, as well as a potential conflict in selecting affiliated funds over unaffiliated funds.<br /><br /><b>Issuer Risk.</b> An issuer in which the Fund invests may perform poorly, and therefore, the value of its securities may decline, which would negatively affect the Fund&#8217;s performance. Poor performance may be caused by poor management decisions, competitive pressures, breakthroughs in technology, reliance on suppliers, labor problems or shortages, corporate restructurings, fraudulent disclosures, natural disasters or other events, conditions or factors.<br /><br /><b>Market Risk.</b> Market risk refers to the possibility that the market values of securities or other investments that the Fund holds will fall, sometimes rapidly or unpredictably, or fail to rise. An investment in the Fund could lose money over short or even long periods. In general, equity securities tend to have greater price volatility than debt securities.<br /><br /><b>Sector Risk.</b> At times, the Fund may have a significant portion of its assets invested in securities of companies conducting business in a related group of industries within an economic sector, including the financial services sector. Companies in the same economic sector may be similarly affected by economic, regulatory, political or market events or conditions, making the Fund more vulnerable to unfavorable developments in that economic sector than funds that invest more broadly. The more a fund diversifies its investments, the more it spreads risk and potentially reduces the risks of loss and volatility. Because the Fund&#8217;s portfolio managers may invest significantly in the financial services sector, the Fund may be more susceptible to the particular risks of the financial services sector than if the Fund were invested in a wider variety of companies in unrelated industries.<br /><br /><b>Small- and Mid-Cap Company Securities Risk.</b> Investments in small- and mid-capitalization companies (small- and mid-cap companies) often involve greater risks than investments in larger, more established companies (larger companies) because small- and mid-cap companies tend to have less predictable earnings and may lack the management experience, financial resources, product diversification and competitive strengths of larger companies, and securities of small- and mid-cap companies may be less liquid and more volatile than the securities of larger companies.<br /><br /><b>Value Securities Risk.</b> Value securities are securities of companies that may have experienced, for example, adverse business, industry or other developments or may be subject to special risks that have caused the securities to be out of favor and, in turn, potentially undervalued. The market value of a portfolio security may not meet the portfolio manager's perceived value assessment of that security, or may decline in price, even though the portfolio manager(s) believe(s) the securities are already undervalued. There is also a risk that it may take longer than expected for the value of these investments to rise to the portfolio manager&#8217;s perceived value. In addition, value securities, at times, may not perform as well as growth securities or the stock market in general, and may be out of favor with investors for varying periods of time.<b>Performance Information</b>The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower. Class A share performance (without sales charges) is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.<br/><br/>The performance of one or more share classes shown in the table below begins before the indicated inception date for such share class. The returns shown for each such share class include the returns of the Fund&#8217;s Class A shares (without applicable sales charges and adjusted to reflect the higher class-related operating expenses of such classes, where applicable) for periods prior to its inception date. Except for differences in annual returns resulting from differences in expenses and sales charges (where applicable), the share classes of the Fund would have substantially similar annual returns because all share classes of the Fund invest in the same portfolio of securities.<br/><br/>The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Your actual after-tax returns will depend on your personal tax situation and may differ from those shown in the table. In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs). The after-tax returns are shown only for Class A shares and will vary for other share classes. Returns after taxes on distributions and sale of Fund shares are higher than before-tax returns for certain periods shown because they reflect the tax benefit of capital losses realized on the redemption of Fund shares. After-tax returns are shown for Class A shares because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public.<br/><br/><b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b> Updated performance information can be obtained by calling toll-free 800.345.6611 or visiting columbiamanagement.com.0.13There is no assurance that the Fund will achieve its investment objective and you may lose money.The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower. Class A share performance (without sales charges) is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.800.345.6611columbiamanagement.com<b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b><b>Year by Year Total Return (%)<br/>as of December 31 Each Year</b><b>Best and Worst Quarterly Returns <br/>During the Period Shown in the Bar Chart</b> <br/><br/>Best&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2nd Quarter 2003&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 26.68%<br/><br/><br/>Worst&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3rd Quarter 2011&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -17.52%<b>Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)</b>The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs).The after-tax returns are shown only for Class A shares and will vary for other share classes.Returns after taxes on distributions and sale of Fund shares are higher than before-tax returns for certain periods shown because they reflect the tax benefit of capital losses realized on the redemption of Fund shares.other expenses for Class R4 and Class R5 are based on estimated amounts for the Fund&#8217;s current fiscal year.Management fees have been restated to reflect contractual changes to the investment advisory fee rates. Other expenses for Class A, Class B, Class C, Class I, Class R and Class Z have been restated to reflect contractual changes to certain fees paid by the FundThis charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months of purchase, charged as follows: 1.00% CDSC if redeemed within 12 months of purchase, and 0.50% CDSC if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.This charge decreases over time.This charge applies to redemptions within one year of purchase, with certain limited exceptions.These fees and expenses and the example below reflect the expenses of both the Fund and Columbia International Value Master Portfolio (the Master Portfolio).0.05750000000.010.050.010000000.00760.00760.00760.00760.00760.00760.00760.00760000.00500.010.010.00250.00370.00370.00370.00170.00370.00370.00220.00370.01130.00980.01130.01630.00930.02130.02130.0138707716316951661151001159879676672965143593123591287134411445158876225426222137227124621143193313751201137570721621695166115100115667987667296514359312359128711441144515887622542622213722712462114319331375120113750.50450.24170.10160.28260.0672-0.35620.2230.0243-0.1090.10010.03690.03090.03140.04180.08210.0870.09640.10050.10050.10260.1769-0.0572-0.0632-0.0466-0.0558-0.0532-0.0513-0.0487-0.0459-0.0459-0.0436-0.04340.07690.06530.06980.07540.07520.08030.08020.08340.08340.0860.08571995-12-271995-12-271995-12-271998-05-221998-06-152010-09-272010-09-272012-11-082012-11-081995-12-27<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleShareholderFeesColumbiaInternationalValueFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualFundOperatingExpensesColumbiaInternationalValueFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleTransposedColumbiaInternationalValueFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleNoRedemptionTransposedColumbiaInternationalValueFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualTotalReturnsColumbiaInternationalValueFundBarChart column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAverageAnnualTotalReturnsTransposedColumbiaInternationalValueFund column period compact * ~</div>
The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower.Year to Date return2013-03-31Best2003-06-300.26680.0418Worst2011-09-30-0.1752<b>Summary of the Fund</b><b>Investment Objective</b>Columbia Overseas Value Fund (the Fund) seeks long-term capital appreciation.<b>Fees and Expenses of the Fund</b>This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 19 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) under <b>Sales Charge Waivers</b> beginning on page S-1.You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 19 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) under <b>Sales Charge Waivers</b> beginning on page S-1.50000<b>Shareholder Fees (fees paid directly from your investment)</b><b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)</b>This charge decreases over time.This charge applies to redemptions within one year of purchase, with certain limited exceptions.This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months of purchase, charged as follows: 1.00% CDSC if redeemed within 12 months of purchase, and 0.50% CDSC if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.Other expenses for Class W and Class Z have been restated to reflect contractual changes to certain fees paid by the Fundother expenses for Class A, Class B, Class C, Class K and Class R are based on estimated amounts for the Fund&#8217;s current fiscal year.June 30, 2014<b>Example</b>The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example illustrates the hypothetical expenses that you would incur over the time periods indicated, and assumes that:<ul type="square"><li style="margin-left:-20px">you invest $10,000 in the applicable class of Fund shares for the periods indicated,</li></ul><ul type="square"><li style="margin-left:-20px">your investment has a 5% return each year, and</li></ul><ul type="square"><li style="margin-left:-20px">the Fund&#8217;s total annual operating expenses remain the same as shown in the Annual Fund Operating Expenses table above.</li></ul>Since the waivers and/or reimbursements shown in the Annual Fund Operating Expenses table above expire as indicated in the preceding table, they are only reflected in the 1 year example and the first year of the other examples. Although your actual costs may be higher or lower, based on the assumptions listed above, your costs would be:<b>Portfolio Turnover</b>The Fund may pay transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 46% of the average value of its portfolio.0.46<b>Principal Investment Strategies</b>Under normal circumstances, the Fund invests at least 80% of total assets (including the amount of any borrowings for investment purposes) in equity securities of foreign companies that have market capitalizations of more than $1 billion at the time of purchase. The Fund typically invests in foreign companies in at least three countries, other than the United States, at any one time and may invest in emerging markets. The Fund may invest directly in foreign securities or indirectly through closed-end investment companies and depositary receipts.<br/><br/>The Fund may invest in currency forwards, futures and options for both hedging and non-hedging purposes, including, for example, to seek to enhance returns or, in certain unusual circumstances, when holding a derivative is deemed preferable to holding the underlying asset.<br/><br/>The Fund has the following limits on its investments, which are applied at the time an investment is made. The Fund:<ul type="square"><li style="margin-left:-20px">normally invests no more than 5% of its total assets in a single security;</li></ul><ul type="square"><li style="margin-left:-20px">typically invests up to the greater of (i) 20% of its total assets in a single country or industry or (ii) 150% of the weighting of a single country or industry in the MSCI Europe, Australasia, Far East (MSCI EAFE) Value Index (limited to less than 25% of its total assets in a single industry, other than U.S. Government obligations); and</li></ul><ul type="square"><li style="margin-left:-20px">generally may not invest more than 20% of its total assets in emerging markets.</li></ul>The investment manager combines fundamental and quantitative analysis with risk management in identifying value opportunities and constructing the Fund's portfolio.<b>Principal Risks</b>An investment in the Fund involves risk, including those described below. There is no assurance that the Fund will achieve its investment objective and you may lose money. The value of the Fund&#8217;s holdings may decline, and the Fund&#8217;s net asset value (NAV) and Fund share price may go down.<br /><br /><b>Active Management Risk.</b> Due to its active management, the Fund could underperform its benchmark index and/or other funds with a similar investment objective. The Fund may fail to achieve its investment objective and you may lose money.<br /><br /><b>Depositary Receipts Risks.</b> Depositary receipts are receipts issued by a bank or trust company and evidence of ownership of underlying securities issued by foreign companies. Some foreign securities are traded in the form of American Depositary Receipts (ADRs). Depositary receipts involve the risks of other investments in foreign securities, including risks associated with investing in the particular country, including the political, regulatory, economic, social and other conditions or events occurring in the country, as well as fluctuations in its currency. In addition, ADR holders may not have all the legal rights of shareholders and may experience difficulty in receiving shareholder communications.<br /><br /><b>Derivatives Risk.</b> Losses involving derivative instruments may be substantial, because a relatively small price movement in the underlying security(ies), instrument, commodity, currency or index may result in a substantial loss for the Fund. In addition to the potential for increased losses, the use of derivative instruments may lead to increased volatility within the Fund. Derivatives will typically increase the Fund&#8217;s exposure to principal risks to which it is otherwise exposed, and may expose the Fund to additional risks, including correlation risk, counterparty risk, hedging risk, leverage risk and liquidity risk. Below is more detailed information on certain derivatives expected to be utilized by the Fund.<br /><br /><b>Derivatives Risk/Forward Foreign Currency Contracts Risk.</b> These instruments are a type of derivative contract whereby the Fund may agree to buy or sell a country&#8217;s or region&#8217;s currency at a specific price on a specific date in the future. These contracts may fall in value due to foreign market downswings or foreign currency value fluctuations. The Fund&#8217;s investment or hedging strategies may not achieve their objective. Investment in these instruments also subjects the Fund to counterparty risk.<br /><br /><b>Derivatives Risk/Futures Contracts Risk.</b> The loss that may be incurred in entering into futures contracts may exceed the amount of the premium paid and may be potentially unlimited. Futures markets are highly volatile and the use of futures may increase the volatility of the Fund&#8217;s net asset value (NAV). Additionally, as a result of the low collateral deposits normally involved in futures trading, a relatively small price movement in a futures contract may result in substantial losses to the Fund. Futures contracts may be illiquid. Furthermore, exchanges may limit fluctuations in futures contract prices during a trading session by imposing a maximum permissible price movement on each futures contract. The Fund may be disadvantaged if it is prohibited from executing a trade outside the daily permissible price movement. Futures contracts executed on foreign exchanges may not provide the same protection as U.S. exchanges. These transactions involve additional risks, including counterparty risk, hedging risk and pricing risk.<br /><br /><b>Derivatives Risk/Options Risk.</b> If the Fund sells a put option, there is a risk that the Fund may be required to buy the underlying asset at a disadvantageous price. If the Fund sells a call option, there is a risk that the Fund may be required to sell the underlying asset at a disadvantageous price, and if the call option sold is not covered (for example, by owning the underlying asset), the Fund's losses are potentially unlimited. These transactions involve other risks, including counterparty risk and hedging risk.<br /><br /><b>Emerging Market Securities Risk.</b> Securities issued by foreign governments or companies in emerging market countries are more likely to have greater exposure to the risks of investing in foreign securities that are described in Foreign Securities Risk. In addition, emerging market countries are more likely to experience instability resulting, for example, from rapid changes or developments in social, political and economic conditions. Their economies are usually less mature and their securities markets are typically less developed with more limited trading activity (i.e., lower trading volumes and less liquidity) than more developed countries. Emerging market securities tend to be more volatile than securities in more developed markets. Many emerging market countries are heavily dependent on international trade and have fewer trading partners, which makes them more sensitive to world commodity prices and economic downturns in other countries, and some have a higher risk of currency devaluations.<br /><br /><b>Foreign Currency Risk.</b> The performance of the Fund may be materially affected positively or negatively by foreign currency strength or weakness relative to the U.S. dollar, particularly if the Fund invests a significant percentage of its assets in foreign securities or other assets denominated in currencies other than the U.S. dollar.<br /><br /><b>Foreign Securities Risk.</b> Investments in foreign securities involve certain risks not associated with investments in securities of U.S. companies. Foreign securities subject the Fund to the risks associated with investing in the particular country, including the political, regulatory, economic, social, diplomatic and other conditions or events occurring in the country or region, as well as fluctuations in its currency and the risks associated with less developed custody and settlement practices. Foreign securities may be more volatile and less liquid than investments in securities of U.S. companies.<br /><br /><b>Investing in Other Funds Risk.</b> The Fund&#8217;s investment in other funds (affiliated and/or unaffiliated funds, including exchange-traded funds (ETFs)) subjects the Fund to the investment performance (positive or negative) and risks of these underlying funds in direct proportion to the Fund&#8217;s investment therein. The performance of underlying funds could be adversely affected if other entities that invest in the same underlying funds make relatively large investments or redemptions in such underlying funds. The Fund, and its shareholders, indirectly bear a portion of the expenses of any funds in which the Fund invests. Because the expenses and costs of a fund are shared by its investors, redemptions by other investors in the fund could result in decreased economies of scale and increased operating expenses for such fund. The Investment Manager may have potential conflicts of interest in selecting affiliated underlying funds for investment by the Fund because the fees paid to it by some underlying funds are higher than the fees paid by other underlying funds, as well as a potential conflict in selecting affiliated funds over unaffiliated funds.<br /><br /><b>Issuer Risk.</b> An issuer in which the Fund invests may perform poorly, and therefore, the value of its securities may decline, which would negatively affect the Fund&#8217;s performance. Poor performance may be caused by poor management decisions, competitive pressures, breakthroughs in technology, reliance on suppliers, labor problems or shortages, corporate restructurings, fraudulent disclosures, natural disasters or other events, conditions or factors.<br /><br /><b>Market Risk.</b> Market risk refers to the possibility that the market values of securities or other investments that the Fund holds will fall, sometimes rapidly or unpredictably, or fail to rise. An investment in the Fund could lose money over short or even long periods. In general, equity securities tend to have greater price volatility than debt securities.<br /><br /><b>Sector Risk.</b> At times, the Fund may have a significant portion of its assets invested in securities of companies conducting business in a related group of industries within an economic sector, including the financial services sector. Companies in the same economic sector may be similarly affected by economic, regulatory, political or market events or conditions, making the Fund more vulnerable to unfavorable developments in that economic sector than funds that invest more broadly. The more a fund diversifies its investments, the more it spreads risk and potentially reduces the risks of loss and volatility. Because the Fund&#8217;s portfolio managers may invest significantly in the financial services sector, the Fund may be more susceptible to the particular risks of the financial services sector than if the Fund were invested in a wider variety of companies in unrelated industries.<br /><br /><b>Small- and Mid-Cap Company Securities Risk.</b> Investments in small- and mid-capitalization companies (small- and mid-cap companies) often involve greater risks than investments in larger, more established companies (larger companies) because small- and mid-cap companies tend to have less predictable earnings and may lack the management experience, financial resources, product diversification and competitive strengths of larger companies, and securities of small- and mid-cap companies may be less liquid and more volatile than the securities of larger companies.<br /><br /><b>Value Securities Risk.</b> Value securities are securities of companies that may have experienced, for example, adverse business, industry or other developments or may be subject to special risks that have caused the securities to be out of favor and, in turn, potentially undervalued. The market value of a portfolio security may not meet the portfolio manager's perceived value assessment of that security, or may decline in price, even though the portfolio manager(s) believe(s) the securities are already undervalued. There is also a risk that it may take longer than expected for the value of these investments to rise to the portfolio manager&#8217;s perceived value. In addition, value securities, at times, may not perform as well as growth securities or the stock market in general, and may be out of favor with investors for varying periods of time.There is no assurance that the Fund will achieve its investment objective and you may lose money.<b>Performance Information</b>The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class Z share performance has varied for each full calendar year shown. Class Z share performance is shown in the bar chart because the Fund has less than ten calendar years of performance and Class Z shares are the oldest share class of the Fund. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.<br/><br/>The performance of one or more share classes shown in the table below begins before the indicated inception date for such share class. The returns shown for each such share class include the returns of the Fund&#8217;s Class Z shares (adjusted to reflect the higher class-related operating expenses of such classes, where applicable) for periods prior to its inception date. Class A, Class B, Class C and Class K shares of the Fund commenced operations after the periods ended shown in the table below and, therefore, performance is not yet available. Class R shares of the Fund did not commence operations prior to the date of this prospectus and, therefore, performance is not yet available. Except for differences in annual returns resulting from differences in expenses and sales charges (where applicable), the share classes of the Fund would have substantially similar annual returns because all share classes of the Fund invest in the same portfolio of securities.<br/><br/>The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Your actual after-tax returns will depend on your personal tax situation and may differ from those shown in the table. In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs). The after-tax returns are shown only for Class Z shares and will vary for other share classes. Returns after taxes on distributions and sale of Fund shares are higher than before-tax returns for certain periods shown because they reflect the tax benefit of capital losses realized on the redemption of Fund shares. After-tax returns are shown for Class Z shares because the Fund has less than ten calendar years of performance and Class Z shares are the oldest share class of the Fund.<br/><br/><b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b> Updated performance information can be obtained by calling toll-free 800.345.6611 or visiting columbiamanagement.com.The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class Z share performance has varied for each full calendar year shown. Class Z share performance is shown in the bar chart because the Fund has less than ten calendar years of performance and Class Z shares are the oldest share class of the Fund. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.Class A, Class B, Class C and Class K shares of the Fund commenced operations after the periods ended shown in the table below and, therefore, performance is not yet available. Class R shares of the Fund did not commence operations prior to the date of this prospectus and, therefore, performance is not yet available.800.345.6611columbiamanagement.com<b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b>The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs).The after-tax returns are shown only for Class Z shares and will vary for other share classes.Returns after taxes on distributions and sale of Fund shares are higher than before-tax returns for certain periods shown because they reflect the tax benefit of capital losses realized on the redemption of Fund shares.<b>Year by Year Total Return (%)<br/>as of December 31 Each Year</b><b>Best and Worst Quarterly Returns <br/>During the Period Shown in the Bar Chart</b> <br/><br/>Best&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2nd Quarter 2009&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 32.29%<br/><br/><br/>Worst&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3rd Quarter 2011&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -18.87%Year to Date return2013-03-310.0321Best2009-06-300.3229Worst2011-09-30-0.1887<b>Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)</b>0.05750000000000000.010.050.010.00790.00790.00790.00790.00790.00790.00790.00790.00250.010.01000.0050.002500.00540.00540.00540.00540.00590.00540.00540.00540.01580.01830.01380.01330.01330.02330.02330.0158-0.0017-0.0017-0.0017-0.0037-0.0012-0.0017-0.0017-0.00170.01160.01410.01660.01260.00960.02160.02160.0141710719319981281691441181029101171138542555948240513711430123069374497584471323322465265315691647213418641587710219219981281441691181029711711385425559482405137112301230693744975844713233224652653156916472134186415870.33730.0464-0.10380.1780.1780.17650.12350.17860.1740.1769-0.0262-0.0298-0.0215-0.026-0.0277-0.0252008-03-312008-03-312008-03-312011-03-312011-03-31<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleShareholderFeesColumbiaOverseasValueFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualFundOperatingExpensesColumbiaOverseasValueFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleTransposedColumbiaOverseasValueFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleNoRedemptionTransposedColumbiaOverseasValueFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualTotalReturnsColumbiaOverseasValueFundBarChart column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAverageAnnualTotalReturnsTransposedColumbiaOverseasValueFund column period compact * ~</div>
<b>Summary of the Fund</b><b>Investment Objective</b>Columbia Convertible Securities Fund (the Fund) seeks total return, consisting of capital appreciation and current income.<b>Summary of the Fund</b><b>Investment Objective</b>Columbia Large Cap Core Fund (the Fund) seeks long-term capital appreciation.<b>Fees and Expenses of the Fund</b>This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 18 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) under <b>Sales Charge Waivers</b> beginning on page S-1.<b>Shareholder Fees (fees paid directly from your investment)</b><b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)</b><b>Example</b>The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example illustrates the hypothetical expenses that you would incur over the time periods indicated, and assumes that:<ul type="square"><li style="margin-left:-20px">you invest $10,000 in the applicable class of Fund shares for the periods indicated,</li></ul><ul type="square"><li style="margin-left:-20px">your investment has a 5% return each year, and</li></ul><ul type="square"><li style="margin-left:-20px">the Fund&#8217;s total annual operating expenses remain the same as shown in the Annual Fund Operating Expenses table above.</li></ul>Since the waivers and/or reimbursements shown in the Annual Fund Operating Expenses table above expire as indicated in the preceding table, they are only reflected in the 1 year example and the first year of the other examples. Although your actual costs may be higher or lower, based on the assumptions listed above, your costs would be:<b>Portfolio Turnover</b>The Fund may pay transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 147% of the average value of its portfolio.<b>Principal Investment Strategies</b>Under normal circumstances, the Fund invests at least 80% of its net assets (including the amount of any borrowings for investment purposes) in securities of companies that have market capitalizations, at the time of purchase, in the range of companies in the Standard &amp; Poor&#8217;s (S&amp;P) 500 Index (the Index). The market capitalization range of the companies included within the Index was $1.8 billion to $422.3 billion as of May 31, 2013.<br/><br/>The Fund may invest up to 20% of its total assets in foreign securities. The Fund normally invests in common stocks, preferred stocks and convertible securities like warrants and rights and may invest in exchange-traded funds.<br/><br/>The Fund may invest in derivatives, including options and other derivative instruments. The Fund may invest in derivatives for both hedging and non-hedging purposes, including, for example, to seek to enhance returns or as a substitute for a position in an underlying asset.<br/><br/>The Fund&#8217;s portfolio may from time to time emphasize one or more economic sectors, which may include, among other sectors, the technology sector.<br/><br/>The Fund&#8217;s investment strategy may involve the frequent trading of portfolio securities. This may cause the Fund to incur higher transaction costs (which may adversely affect the Fund&#8217;s performance) and may increase taxable distributions for shareholders.<b>Principal Risks</b>An investment in the Fund involves risk, including those described below. There is no assurance that the Fund will achieve its investment objective and you may lose money. The value of the Fund&#8217;s holdings may decline, and the Fund&#8217;s net asset value (NAV) and Fund share price may go down.<br/><br/><b>Active Management Risk.</b> Due to its active management, the Fund could underperform its benchmark index and/or other funds with a similar investment objective. The Fund may fail to achieve its investment objective and you may lose money.<br/><br/><b>Convertible Securities Risk.</b> Convertible securities are subject to the usual risks associated with debt securities, such as interest rate risk and credit risk. Convertible securities also react to changes in the value of the common stock into which they convert, and are thus subject to market risk. The Fund may also be forced to convert a convertible security at an inopportune time, which may decrease the Fund&#8217;s return.<br/><br/><b>Derivatives Risk.</b> Losses involving derivative instruments may be substantial, because a relatively small price movement in the underlying security(ies), instrument, commodity, currency or index may result in a substantial loss for the Fund. In addition to the potential for increased losses, the use of derivative instruments may lead to increased volatility within the Fund. Derivatives will typically increase the Fund&#8217;s exposure to principal risks to which it is otherwise exposed, and may expose the Fund to additional risks, including correlation risk, counterparty risk, hedging risk, leverage risk and liquidity risk. Below is more detailed information on certain derivatives expected to be utilized by the Fund.<br/><br/><b>Derivatives Risk/Options Risk.</b> If the Fund sells a put option, there is a risk that the Fund may be required to buy the underlying asset at a disadvantageous price. If the Fund sells a call option, there is a risk that the Fund may be required to sell the underlying asset at a disadvantageous price, and if the call option sold is not covered (for example, by owning the underlying asset), the Fund's losses are potentially unlimited. These transactions involve other risks, including counterparty risk and hedging risk.<br/><br/><b>Foreign Currency Risk.</b> The performance of the Fund may be materially affected positively or negatively by foreign currency strength or weakness relative to the U.S. dollar, particularly if the Fund invests a significant percentage of its assets in foreign securities or other assets denominated in currencies other than the U.S. dollar.<br/><br/><b>Foreign Securities Risk.</b> Investments in foreign securities involve certain risks not associated with investments in securities of U.S. companies. Foreign securities subject the Fund to the risks associated with investing in the particular country, including the political, regulatory, economic, social, diplomatic and other conditions or events occurring in the country or region, as well as fluctuations in its currency and the risks associated with less developed custody and settlement practices. Foreign securities may be more volatile and less liquid than investments in securities of U.S. companies.<br/><br/><b>Frequent Trading Risk.</b> &nbsp;The portfolio managers may actively and frequently trade investments in the Fund's portfolio to carry out its investment strategies. Frequent trading of investments increases the possibility that the Fund, as relevant, will realize taxable capital gains (including short-term capital gains, which are generally taxable to shareholders at higher rates than long-term capital gains for U.S. federal income tax purposes), which could reduce the Fund's after-tax return. Frequent trading can also mean higher brokerage and other transaction costs, which could reduce the Fund's return. The trading costs and tax effects associated with portfolio turnover may adversely affect the Fund&#8217;s performance.<br/><br/><b>Investing in Other Funds Risk.</b> The Fund&#8217;s investment in other funds (affiliated and/or unaffiliated funds, including exchange-traded funds (ETFs)) subjects the Fund to the investment performance (positive or negative) and risks of these underlying funds in direct proportion to the Fund&#8217;s investment therein. The performance of underlying funds could be adversely affected if other entities that invest in the same underlying funds make relatively large investments or redemptions in such underlying funds. The Fund, and its shareholders, indirectly bear a portion of the expenses of any funds in which the Fund invests. Because the expenses and costs of a fund are shared by its investors, redemptions by other investors in the fund could result in decreased economies of scale and increased operating expenses for such fund. The Investment Manager may have potential conflicts of interest in selecting affiliated underlying funds for investment by the Fund because the fees paid to it by some underlying funds are higher than the fees paid by other underlying funds, as well as a potential conflict in selecting affiliated funds over unaffiliated funds.<br/><br/><b>Issuer Risk.</b> An issuer in which the Fund invests may perform poorly, and therefore, the value of its securities may decline, which would negatively affect the Fund&#8217;s performance. Poor performance may be caused by poor management decisions, competitive pressures, breakthroughs in technology, reliance on suppliers, labor problems or shortages, corporate restructurings, fraudulent disclosures, natural disasters or other events, conditions or factors.<br/><br/><b>Market Risk.</b> Market risk refers to the possibility that the market values of securities or other investments that the Fund holds will fall, sometimes rapidly or unpredictably, or fail to rise. An investment in the Fund could lose money over short or even long periods. In general, equity securities tend to have greater price volatility than debt securities.<br/><br/><b>Sector Risk.</b> At times, the Fund may have a significant portion of its assets invested in securities of companies conducting business in a related group of industries within an economic sector. Companies in the same economic sector may be similarly affected by economic, regulatory, political or market events or conditions, making the Fund more vulnerable to unfavorable developments in that economic &nbsp;sector than funds that invest more broadly. The more a fund diversifies its investments, the more it spreads risk and potentially reduces the risks of loss and volatility.<br/><br/><b>Technology and Technology-Related Investment Risk.</b> Companies in the technology sector and technology-related sectors are subject to significant competitive pressures, such as aggressive pricing of their products or services, new market entrants, competition for market share, short product cycles due to an accelerated rate of technological developments and the potential for limited earnings and/or falling profit margins. These companies also face the risks that new services, equipment or technologies will not be accepted by consumers and businesses or will become rapidly obsolete. These factors can affect the profitability of these companies and, as a result, the value of their securities. Also, patent protection is integral to the success of many companies in these sectors, and profitability can be affected materially by, among other things, the cost of obtaining (or failing to obtain) patent approvals, the cost of litigating patent infringement and the loss of patent protection for products (which significantly increases pricing pressures and can materially reduce profitability with respect to such products). In addition, many technology companies have limited operating histories. Prices of these companies' securities historically have been more volatile than other securities, especially over the short term. Because the Fund concentrates its investments (or, invests a significant portion of its net assets) in securities of technology and technology-related companies, the Fund's price may be more volatile than a fund that is invested in a more diverse range of market sectors.<b>Performance Information</b>The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower. Class A share performance (without sales charges) is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.<br/><br/>The performance of one or more share classes shown in the table below begins before the indicated inception date for such share class. The returns shown for each such share class include the returns of the Fund&#8217;s Class Z shares (adjusted to reflect the higher class-related operating expenses of such classes, where applicable) for periods prior to its inception date. Except for differences in annual returns resulting from differences in expenses and sales charges (where applicable), the share classes of the Fund would have substantially similar annual returns because all share classes of the Fund invest in the same portfolio of securities.<br/><br/>The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Your actual after-tax returns will depend on your personal tax situation and may differ from those shown in the table. In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs). The after-tax returns are shown only for Class A shares and will vary for other share classes. After-tax returns are shown for Class A shares because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public.<br/><br/><b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b> Updated performance information can be obtained by calling toll-free 800.345.6611 or visiting columbiamanagement.com.<b>Year by Year Total Return (%)<br/>as of December 31 Each Year</b><b>Best and Worst Quarterly Returns <br/>During the Period Shown in the Bar Chart</b> <br/><br/>Best&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2nd Quarter 2009&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 14.67%<br/><br/><br/>Worst&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4th Quarter 2008&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -20.25%<b>Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)</b>0.057500000000000.010.050.01<b>Fees and Expenses of the Fund</b>This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 18 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) under <b>Sales Charge Waivers</b> beginning on page S-1.<b>Shareholder Fees (fees paid directly from your investment)</b>0.00690.00690.00690.00690.00690.00690.006900.0025000.010.010.00250.0575000000000.00290.00290.00290.0010.00150.00290.00290.00980.01230.00840.00790.01980.01980.01230000000.010.050.01-0.0005-0.0005-0.0005-0.0001-0.0001-0.0005-0.00052013-07-01485BPOSCOLUMBIA FUNDS SERIES TRUST0.00930.01180.00830.00780.01930.01930001097519false0.01182013-06-272013-07-012013-02-28<b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)</b>0.00760.00760.00760.00760.00760.00760.00760.00760.00760.00250.010.0100.005000.002500.00390.00390.00390.00130.00390.00390.00180.00390.00390.0140.02150.02150.00890.01650.01150.00940.0140.0115-0.003-0.003-0.003-0.0023-0.003-0.003-0.0023-0.003-0.0036886962968085120959389176172512673853070.0110.01850.01850.00660.01350.00850.00710.0110.0085120712631063438465671537197421082302977103614841197688196196808512095938617617251267385307120710631063438465671537197421082302977103614841197<b>Example</b>The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example illustrates the hypothetical expenses that you would incur over the time periods indicated, and assumes that:<ul type="square"><li style="margin-left:-20px">you invest $10,000 in the applicable class of Fund shares for the periods indicated,</li></ul><ul type="square"><li style="margin-left:-20px">your investment has a 5% return each year, and</li></ul><ul type="square"><li style="margin-left:-20px">the Fund&#8217;s total annual operating expenses remain the same as shown in the Annual Fund Operating Expenses table above.</li></ul>Since the waivers and/or reimbursements shown in the Annual Fund Operating Expenses table above expire as indicated in the preceding table, they are only reflected in the 1 year example and the first year of the other examples. Although your actual costs may be higher or lower, based on the assumptions listed above, your costs would be:0.273688681288671378773112870.08070.0590.15420.0997-0.35890.240.1376-0.02250.17289659446442614913362774143361270132711274718696044987376041999-08-021999-08-021999-08-021999-08-021999-08-022012-11-082010-09-272010-09-271998-10-020.10540.09820.0780.11370.15470.17720.1760.1730.17560.16213422682459107519291371113416541371-0.0046-0.0075-0.0042-0.0041-0.00030.01040.00970.00760.00960.01660.06090.05780.0530.05910.05910.07010.06970.06740.06960.071681188188671378773112870000.0575000000.010.050.019656446442614913362774143361270112711274718696044987376042134226824591075192913711134165413710.00670.00670.00670.00670.00670.00670.00250.010.010.005000.00260.00260.00260.00260.00260.00260.01180.01930.01930.01430.00930.0093<b>Portfolio Turnover</b>The Fund may pay transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 71% of the average value of its portfolio.<b>Principal Investment Strategies</b>Under normal circumstances, the Fund invests at least 80% of its net assets (including the amount of any borrowings for investment purposes) in convertible securities. The Fund may invest up to 15% of its total assets in Eurodollar convertible securities and up to an additional 20% of its total assets in foreign securities. Most convertible securities are not investment grade-rated. Convertible securities rated below investment grade may be referred to as &#8220;junk bonds.&#8221; The Fund also may invest in directly in equity securities.<br/><br/>The Fund looks for opportunities to participate in the potential growth of underlying common stocks, while seeking to earn income that is generally higher than the income those stocks provide. The Fund may sell common stocks short against positions in which the Fund has directly invested in convertible securities with no more than 10% of its assets. The Fund also may invest in private placements.<b>Principal Risks</b>An investment in the Fund involves risk, including those described below. There is no assurance that the Fund will achieve its investment objective and you may lose money. The value of the Fund&#8217;s holdings may decline, and the Fund&#8217;s net asset value (NAV) and Fund share price may go down.<br/><br/><b>Active Management Risk.</b> Due to its active management, the Fund could underperform its benchmark index and/or other funds with a similar investment objective. The Fund may fail to achieve its investment objective and you may lose money.<br/><br/><b>Convertible Securities Risk.</b> Convertible securities are subject to the usual risks associated with debt securities, such as interest rate risk and credit risk. Convertible securities also react to changes in the value of the common stock into which they convert, and are thus subject to market risk. The Fund may also be forced to convert a convertible security at an inopportune time, which may decrease the Fund&#8217;s return.<br/><br/><b>Credit Risk.</b> Credit risk is the risk that the issuer of a fixed-income security may or will default or otherwise become unable or unwilling, or is perceived to be unable or unwilling, to honor a financial obligation, such as making payments to the Fund when due. If the Fund purchases unrated securities, or if the rating of a security is lowered after purchase, the Fund will depend on analysis of credit risk more heavily than usual. Unrated securities held by the Fund may present increased credit risk as compared to higher-rated securities.<br/><br/><b>Foreign Currency Risk.</b> The performance of the Fund may be materially affected positively or negatively by foreign currency strength or weakness relative to the U.S. dollar, particularly if the Fund invests a significant percentage of its assets in foreign securities or other assets denominated in currencies other than the U.S. dollar.<br/><br/><b>Foreign Securities Risk.</b> Investments in foreign securities involve certain risks not associated with investments in securities of U.S. companies. Foreign securities subject the Fund to the risks associated with investing in the particular country, including the political, regulatory, economic, social, diplomatic and other conditions or events occurring in the country or region, as well as fluctuations in its currency and the risks associated with less developed custody and settlement practices. Foreign securities may be more volatile and less liquid than investments in securities of U.S. companies.<br/><br/><b>Interest Rate Risk.</b> Interest rate risk is the risk of losses attributable to changes in interest rates. In general, if prevailing interest rates rise, the values of debt securities will tend to fall, and if interest rates fall, the values of debt securities will tend to rise. Changes in the value of a debt security usually will not affect the amount of income the Fund receives from it but may affect the value of the Fund's shares. In general, the longer the maturity or duration of a debt security, the greater its sensitivity to changes in interest rates. Interest rate declines also may increase prepayments of debt obligations, which, in turn, would increase prepayment risk. As interest rates rise or spreads widen, the likelihood of prepayment decreases.<br/><br/><b>Issuer Risk.</b> An issuer in which the Fund invests may perform poorly, and therefore, the value of its securities may decline, which would negatively affect the Fund&#8217;s performance. Poor performance may be caused by poor management decisions, competitive pressures, breakthroughs in technology, reliance on suppliers, labor problems or shortages, corporate restructurings, fraudulent disclosures, natural disasters or other events, conditions or factors.<br/><br/><b>Low and Below Investment Grade (High-Yield) Securities Risk.</b> Securities with the lowest investment grade rating, securities rated below investment grade (commonly called &#8220;high-yield&#8221; or &#8220;junk&#8221; bonds) and unrated securities of comparable quality expose the Fund to a greater risk of loss of principal and income than a fund that invests solely or primarily in investment grade securities. In addition, these investments have greater price fluctuations, are less liquid and are more likely to experience a default than higher-rated securities. High-yield securities are considered to be predominantly speculative with respect to the issuer&#8217;s capacity to pay interest and repay principal.<br/><br/><b>Market Risk.</b> Market risk refers to the possibility that the market values of securities or other investments that the Fund holds will fall, sometimes rapidly or unpredictably, or fail to rise. An investment in the Fund could lose money over short or even long periods. In general, equity securities tend to have greater price volatility than debt securities.<br/><br/><b>Prepayment and Extension Risk.</b> Prepayment and extension risk is the risk that a loan, bond or other security or investment might be called or otherwise converted, prepaid or redeemed before maturity, and the portfolio managers may not be able to invest the proceeds in other investments providing as high a level of income, resulting in a reduced yield to the Fund. As interest rates rise or spreads widen, the likelihood of prepayment decreases. The portfolio managers may be unable to capitalize on securities with higher interest rates or wider spreads because the Fund&#8217;s investments are locked in at a lower rate for a longer period of time.<br/><br/><b>Rule 144A Securities Risk.</b> The Fund may invest significantly in Rule 144A securities that are determined to be liquid in accordance with procedures adopted by the Fund&#8217;s Board. However, an insufficient number of qualified institutional buyers interested in purchasing Rule 144A securities at a particular time could affect adversely the marketability of such securities and the Fund might be unable to dispose of such securities promptly or at reasonable prices. Accordingly, even if determined to be liquid, the Fund&#8217;s holdings of Rule 144A securities may increase the level of Fund illiquidity if eligible buyers become uninterested in buying them at a particular time.<br/><br/><b>Short Positions Risk.</b> The Fund may establish short positions which introduce more risk to the Fund than long positions (where the Fund owns the instrument) because the maximum sustainable loss on an instrument purchased (held long) is limited to the amount paid for the instrument plus the transaction costs, whereas there is no maximum price of the shorted instrument when purchased in the open market. Therefore, in theory, short positions have unlimited risk. The Fund&#8217;s use of short positions in effect &#8220;leverages&#8221; the Fund. Leverage potentially exposes the Fund to greater risks of loss due to unanticipated market movements, which may magnify losses and increase the volatility of returns. To the extent the Fund takes a short position in a derivative instrument, this involves the risk of a potentially unlimited increase in the value of the underlying instrument.<b>Performance Information</b>The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower. Class A share performance (without sales charges) is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.<br/><br/>The performance of one or more share classes shown in the table below begins before the indicated inception date for such share class. The returns shown for each such share class include the returns of the Fund&#8217;s Class A shares (without applicable sales charges and adjusted to reflect the higher class-related operating expenses of such classes, where applicable) for periods prior to its inception date. Except for differences in annual returns resulting from differences in expenses and sales charges (where applicable), the share classes of the Fund would have substantially similar annual returns because all share classes of the Fund invest in the same portfolio of securities.<br/><br/>The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Your actual after-tax returns will depend on your personal tax situation and may differ from those shown in the table. In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs). The after-tax returns are shown only for Class A shares and will vary for other share classes. After-tax returns are shown for Class A shares because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public.<br/><br/><b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b> Updated performance information can be obtained by calling toll-free 800.345.6611 or visiting columbiamanagement.com.6886962961469595928906606452296296118712421042782515515<b>Year by Year Total Return (%)<br/>as of December 31 Each Year</b>1924205922541713114311436881961961469595928606606452296296118710421042782515515192420592254171311431143<b>Best and Worst Quarterly Returns <br/>During the Period Shown in the Bar Chart</b> <br/><br/>Best&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3rd Quarter 2009&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 12.42%<br/><br/><br/>Worst&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4th Quarter 2008&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -17.91%0.48560.21940.25950.07980.10850.18530.03220.09730.19880.0639-0.4463-0.33440.27410.1695-0.1236<b>Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)</b>0.33170.06580.05570.04370.07190.11240.13440.12820.13090.13120.13080.13320.14960.1905-0.05030.13050.05320.05320.03470.05980.09980.11620.11840.12150.1642-0.0529-0.0529-0.0442-0.0527-0.044-0.0488-0.0416-0.03930.02040.07790.07670.06880.07610.07610.08160.08440.08690.07682000-04-102000-04-102000-04-102000-04-102000-04-102006-01-232012-11-082000-04-100.01320.00390.00630.01390.01750.02690.02140.02530.02540.02390.0280.04060.06030.04620.04610.05860.05860.06750.06670.06240.06670.0650.06920.0731You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 18 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) under <b>Sales Charge Waivers</b> beginning on page S-1.500001987-09-251987-09-251987-09-251998-07-151996-10-212010-09-272011-11-162012-11-082012-11-082011-11-161999-05-21other expenses for Class R5 are based on estimated amounts for the Fund&#8217;s current fiscal year.Other expenses for Class A, Class B, Class C, Class W and Class Z have been restated to reflect contractual changes to certain fees paid by the FundJune 30, 20141.47There is no assurance that the Fund will achieve its investment objective and you may lose money.The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower. Class A share performance (without sales charges) is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.800.345.6611columbiamanagement.com<b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b>The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs).The after-tax returns are shown only for Class A shares and will vary for other share classes.The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower.Year to Date return2013-03-310.0927Best2009-06-300.1467Worst2008-12-31-0.2025<b>Summary of the Fund</b><b>Investment Objective</b>Columbia Marsico 21st Century Fund (the Fund) seeks long-term growth of capital.<b>Fees and Expenses of the Fund</b><div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleShareholderFeesColumbiaLargeCapCoreFund column period compact * ~</div>
This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 19 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) <b>under Sales Charge Waivers</b> beginning on page S-1.You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 19 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) <b>under Sales Charge Waivers</b> beginning on page S-1.50000<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualFundOperatingExpensesColumbiaLargeCapCoreFund column period compact * ~</div>
<b>Shareholder Fees (fees paid directly from your investment)</b><b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)</b><div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleTransposedColumbiaLargeCapCoreFund column period compact * ~</div>
This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months of purchase, as follows: 1.00% if redeemed within 12 months of purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.This charge decreases over time.This charge applies to redemptions within one year of purchase, with certain limited exceptions.<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleNoRedemptionTransposedColumbiaLargeCapCoreFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualTotalReturnsColumbiaLargeCapCoreFundBarChart column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAverageAnnualTotalReturnsTransposedColumbiaLargeCapCoreFund column period compact * ~</div>
June 30, 20140.71Management fees have been restated to reflect contractual changes to the investment management fee rates. Other expenses for Class A, Class B, Class C, Class R and Class Z have been restated to reflect contractual changes to certain fees paid by the Fundother expenses for Class R4 are based on estimated amounts for the Fund's current fiscal year.<b>Example</b>The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example illustrates the hypothetical expenses that you would incur over the time periods indicated, and assumes that:<ul type="square"><li style="margin-left:-20px">you invest $10,000 in the applicable class of Fund shares for the periods indicated,</li></ul><ul type="square"><li style="margin-left:-20px">your investment has a 5% return each year, and</li></ul><ul type="square"><li style="margin-left:-20px">the Fund&#8217;s total annual operating expenses remain the same as shown in the Annual Fund Operating Expenses table above.</li></ul>Although your actual costs may be higher or lower, based on the assumptions listed above, your costs would be:<b>Portfolio Turnover</b>The Fund may pay transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 65% of the average value of its portfolio.0.65<b>Principal Investment Strategies</b>The Fund invests primarily in equity securities of companies of any capitalization size and generally will hold a core position of between 35 and 50 common stocks. <br/><br/>The number of securities held by the Fund occasionally may exceed this range, such as when the Fund is accumulating new positions, phasing out and replacing existing positions, or responding to exceptional market conditions. The Fund may invest without limit in foreign securities, including in emerging market securities. The Fund may from time to time emphasize one or more economic sectors in selecting its investments.<br/><br/>The Fund also may invest in foreign currency exchange contracts to convert foreign currencies to and from the U.S. dollar, and to hedge against changes in foreign currency exchange rates. <br/><br/>The core investments of the Fund (i.e., the primary investments held by the Fund over time) generally may include established companies and securities that are expected to offer long-term growth potential. However, the Fund's portfolio also may typically include securities of less mature companies, securities with more aggressive growth characteristics, and securities of companies undergoing significant positive developments, such as, without limitation, the introduction of a new product line, the appointment of a new management team, or an acquisition.<br/><br/>The Fund&#8217;s investment strategy may involve the frequent trading of portfolio securities. This may cause the Fund to incur higher transaction costs (which may adversely affect the Fund&#8217;s performance) and may increase taxable distributions for shareholders.<b>Principal Risks</b>An investment in the Fund involves risk, including those described below. There is no assurance that the Fund will achieve its investment objective and you may lose money. The value of the Fund&#8217;s holdings may decline, and the Fund&#8217;s net asset value (NAV) and Fund share price may go down.<br /><br /><b>Active Management Risk.</b> Due to its active management, the Fund could underperform its benchmark index and/or other funds with a similar investment objective. The Fund may fail to achieve its investment objective and you may lose money.<br /><br /><b>Derivatives Risk.</b> Losses involving derivative instruments may be substantial, because a relatively small price movement in the underlying security(ies), instrument, commodity, currency or index may result in a substantial loss for the Fund. In addition to the potential for increased losses, the use of derivative instruments may lead to increased volatility within the Fund. Derivatives will typically increase the Fund&#8217;s exposure to principal risks to which it is otherwise exposed, and may expose the Fund to additional risks, including correlation risk, counterparty risk, hedging risk, leverage risk and liquidity risk. Below is more detailed information on certain derivatives expected to be utilized by the Fund.<br /><br /><b>Derivatives Risk/Forward Foreign Currency Contracts Risk.</b> These instruments are a type of derivative contract whereby the Fund may agree to buy or sell a country&#8217;s or region&#8217;s currency at a specific price on a specific date in the future. These contracts may fall in value due to foreign market downswings or foreign currency value fluctuations. The Fund&#8217;s investment or hedging strategies may not achieve their objective. Investment in these instruments also subjects the Fund to counterparty risk.<br /><br /><b>Emerging Market Securities Risk.</b> Securities issued by foreign governments or companies in emerging market countries are more likely to have greater exposure to the risks of investing in foreign securities that are described in Foreign Securities Risk. In addition, emerging market countries are more likely to experience instability resulting, for example, from rapid changes or developments in social, political and economic conditions. Their economies are usually less mature and their securities markets are typically less developed with more limited trading activity (i.e., lower trading volumes and less liquidity) than more developed countries. Emerging market securities tend to be more volatile than securities in more developed markets. Many emerging market countries are heavily dependent on international trade and have fewer trading partners, which makes them more sensitive to world commodity prices and economic downturns in other countries, and some have a higher risk of currency devaluations.<br /><br /><b>Foreign Currency Risk.</b> The performance of the Fund may be materially affected positively or negatively by foreign currency strength or weakness relative to the U.S. dollar, particularly if the Fund invests a significant percentage of its assets in foreign securities or other assets denominated in currencies other than the U.S. dollar.<br /><br /><b>Foreign Securities Risk.</b> Investments in foreign securities involve certain risks not associated with investments in securities of U.S. companies. Foreign securities subject the Fund to the risks associated with investing in the particular country, including the political, regulatory, economic, social, diplomatic and other conditions or events occurring in the country or region, as well as fluctuations in its currency and the risks associated with less developed custody and settlement practices. Foreign securities may be more volatile and less liquid than investments in securities of U.S. companies.<br /><br /><b>Frequent Trading Risk.</b> &nbsp;The portfolio managers may actively and frequently trade investments in the Fund's portfolio to carry out its investment strategies. Frequent trading of investments increases the possibility that the Fund, as relevant, will realize taxable capital gains (including short-term capital gains, which are generally taxable to shareholders at higher rates than long-term capital gains for U.S. federal income tax purposes), which could reduce the Fund's after-tax return. Frequent trading can also mean higher brokerage and other transaction costs, which could reduce the Fund's return. The trading costs and tax effects associated with portfolio turnover may adversely affect the Fund&#8217;s performance. <br /><br /><b>Growth Securities Risk.</b> Growth securities typically trade at a higher multiple of earnings than other types of equity securities. Accordingly, the market values of growth securities may be more sensitive to adverse economic or other circumstances or changes in current or expected earnings than the market values of other types of securities. In addition, growth securities, at times, may not perform as well as value securities or the stock market in general, and may be out of favor with investors for varying periods of time.<br /><br /><b>Issuer Risk.</b> An issuer in which the Fund invests may perform poorly, and therefore, the value of its securities may decline, which would negatively affect the Fund&#8217;s performance. Poor performance may be caused by poor management decisions, competitive pressures, breakthroughs in technology, reliance on suppliers, labor problems or shortages, corporate restructurings, fraudulent disclosures, natural disasters or other events, conditions or factors.<br /><br /><b>Market Risk.</b> Market risk refers to the possibility that the market values of securities or other investments that the Fund holds will fall, sometimes rapidly or unpredictably, or fail to rise. An investment in the Fund could lose money over short or even long periods. In general, equity securities tend to have greater price volatility than debt securities.<br /><br /><b>Sector Risk.</b> At times, the Fund may have a significant portion of its assets invested in securities of companies conducting business in a related group of industries within an economic sector. Companies in the same economic sector may be similarly affected by economic, regulatory, political or market events or conditions, making the Fund more vulnerable to unfavorable developments in that economic &nbsp;sector than funds that invest more broadly. The more a fund diversifies its investments, the more it spreads risk and potentially reduces the risks of loss and volatility.<br /><br /><b>Small- and Mid-Cap Company Securities Risk.</b> Investments in small- and mid-capitalization companies (small- and mid-cap companies) often involve greater risks than investments in larger, more established companies (larger companies) because small- and mid-cap companies tend to have less predictable earnings and may lack the management experience, financial resources, product diversification and competitive strengths of larger companies, and securities of small- and mid-cap companies may be less liquid and more volatile than the securities of larger companies.There is no assurance that the Fund will achieve its investment objective and you may lose money.This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months after purchase, as follows: 1.00% if redeemed within 12 months of purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.<b>Performance Information</b>The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower. Class A share performance (without sales charges) is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.<br/><br/>The performance of one or more share classes shown in the table below begins before the indicated inception date for such share class. The returns shown for each such share class include the returns of the Fund&#8217;s Class A shares (without applicable sales charges and adjusted to reflect the higher class-related operating expenses of such classes, where applicable) for periods prior to its inception date. Except for differences in annual returns resulting from differences in expenses and sales charges (where applicable), the share classes of the Fund would have substantially similar annual returns because all share classes of the Fund invest in the same portfolio of securities.<br/><br/>The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Your actual after-tax returns will depend on your personal tax situation and may differ from those shown in the table. In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs). The after-tax returns are shown only for Class A shares and will vary for other share classes. Returns after taxes on distributions and sale of Fund shares are higher than before-tax returns for certain periods shown because they reflect the tax benefit of capital losses realized on the redemption of Fund shares. After-tax returns are shown for Class A shares because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public.<br/><br/><b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b> Updated performance information can be obtained by calling toll-free 800.345.6611 or visiting columbiamanagement.com.The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower. Class A share performance (without sales charges) is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 18 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) under <b>Sales Charge Waivers</b> beginning on page S-1.50000The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs).The after-tax returns are shown only for Class A shares and will vary for other share classes.Returns after taxes on distributions and sale of Fund shares are higher than before-tax returns for certain periods shown because they reflect the tax benefit of capital losses realized on the redemption of Fund shares.other expenses for Class R4 and Class R5 are based on estimated amounts for the Fund&#8217;s current fiscal year.<b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b><b>Year by Year Total Return (%)<br/>as of December 31 Each Year</b><b>Best and Worst Quarterly Returns <br/>During the Period Shown in the Bar Chart</b> <br/><br/>Best&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2nd Quarter 2003&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 22.13%<br/><br/><br/>Worst&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4th Quarter 2008&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -25.12%Year to Date return2013-03-310.1052Best2003-06-300.2213Worst2008-12-31<b>Summary of the Fund</b>-0.2512There is no assurance that the Fund will achieve its investment objective and you may lose money.<b>Investment Objective</b>The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower. Class A share performance (without sales charges) is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.800.345.6611800.345.6611Columbia Marsico Global Fund (the Fund) seeks long-term growth of capital.columbiamanagement.comcolumbiamanagement.com<b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b><b>Fees and Expenses of the Fund</b>The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower.This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 21 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) under <b>Sales Charge Waivers</b> beginning on page S-1.The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs).<b>Shareholder Fees (fees paid directly from your investment)</b>The after-tax returns are shown only for Class A shares and will vary for other share classes.0.0575000.010.01000<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleShareholderFeesColumbiaMarsico21stCenturyFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualFundOperatingExpensesColumbiaMarsico21stCenturyFund column period compact * ~</div>
This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months of purchase, as follows: 1.00% if redeemed within 12 months of purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.This charge decreases over time.This charge applies to redemptions within one year of purchase, with certain limited exceptions.<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleTransposedColumbiaMarsico21stCenturyFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleNoRedemptionTransposedColumbiaMarsico21stCenturyFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualTotalReturnsColumbiaMarsico21stCenturyFundBarChart column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAverageAnnualTotalReturnsTransposedColumbiaMarsico21stCenturyFund column period compact * ~</div>
<b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)</b>Year to Date return2013-03-310.0775Best2009-09-300.1242Worst2008-12-31-0.17910.00790.00790.00790.00790.00250.010.00500.01050.01050.01050.01050.02090.02840.02340.0184-0.0059-0.0059-0.0059-0.00590.0150.02250.01750.0125This charge decreases over time.This charge applies to redemptions within one year of purchase, with certain limited exceptions.Other expenses for Class A, Class B, Class C, Class R, Class W and Class Z have been restated to reflect contractual changes to certain fees paid by the FundJune 30, 2014<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleShareholderFeesColumbiaConvertibleSecuritiesFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualFundOperatingExpensesColumbiaConvertibleSecuritiesFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleTransposedColumbiaConvertibleSecuritiesFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleNoRedemptionTransposedColumbiaConvertibleSecuritiesFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualTotalReturnsColumbiaConvertibleSecuritiesFundBarChart column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAverageAnnualTotalReturnsTransposedColumbiaConvertibleSecuritiesFund column period compact * ~</div>
<b>Example</b>The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example illustrates the hypothetical expenses that you would incur over the time periods indicated, and assumes that:<ul type="square"><li style="margin-left:-20px">you invest $10,000 in the applicable class of Fund shares for the periods indicated,</li></ul><ul type="square"><li style="margin-left:-20px">your investment has a 5% return each year, and</li></ul><ul type="square"><li style="margin-left:-20px">the Fund&#8217;s total annual operating expenses remain the same as shown in the Annual Fund Operating Expenses table above.</li></ul>Since the waivers and/or reimbursements shown in the Annual Fund Operating Expenses table above expire as indicated in the preceding table, they are only reflected in the 1 year example and the first year of the other examples. &nbsp;Although your actual costs may be higher or lower, based on the assumptions listed above, your costs would be:<b>Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)</b>7191783281271139824674521158314471197941281331242631211068869629673146957812095928906606227452296243375296118712421042395782515422649515192420592254883171311439421432114371922817812711398246745211583144711979412813312426312110<b>Portfolio Turnover</b>The Fund may pay transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 98% of the average value of its portfolio.0.98<b>Principal Investment Strategies</b><b>Summary of the Fund</b>Under normal circumstances, the Fund will invest significantly (generally, at least 40% of its net assets) in the securities of companies organized or located outside the United States or doing business outside the United States (unless market conditions are not deemed favorable by the portfolio managers, in which case the Fund generally will invest at least 30% of net assets in such foreign securities). The Fund normally invests in common stocks and may invest in companies of any size throughout the world that are selected for their long-term growth potential. The Fund normally invests in companies from at least three different countries, including the United States, and may invest in companies operating in or economically tied to emerging market countries.<br/><br/>The Fund may invest without limit in foreign securities. These securities may be publicly traded in the United States or in foreign markets or both, and may be bought and sold in a foreign currency that the Fund may or may not also hold. The portfolio managers generally select foreign securities on a security-by-security basis based primarily on considerations such as growth potential rather than geographic location or other considerations.<br/><br/>Primarily for hedging purposes, the Fund may invest in derivatives, including futures (including futures on securities indices and foreign currencies), forward contracts on foreign currencies, options (including options on securities and securities indices) and other derivative instruments.<br/><br/>The core investments of the Fund (i.e., the primary investments held by the Fund over time) generally may include established companies and securities that are expected to offer long-term growth potential. However, the Fund's portfolio also may typically include securities of less mature companies, securities with more aggressive growth characteristics, and securities of companies undergoing significant positive developments, such as, without limitation, the introduction of a new product line, the appointment of a new management team, or an acquisition.<br/><br/>The Fund&#8217;s investment strategy may involve the frequent trading of portfolio securities. This may cause the Fund to incur higher transaction costs (which may adversely affect the Fund&#8217;s performance) and may increase taxable distributions for shareholders.<b>Principal Risks</b>The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower.688196196731469578120959286066062274522962433752961187104210423957825154226495151924205922548831713114394214321143<b>Investment Objective</b>Columbia Mid Cap Index Fund (the Fund) seeks total return before fees and expenses that corresponds to the total return of the Standard &amp; Poor&#8217;s (S&amp;P) MidCap 400<sup style="FONT-SIZE: 85%; VERTICAL-ALIGN: text-top">&#174;</sup> Index.An investment in the Fund involves risk, including those described below. There is no assurance that the Fund will achieve its investment objective and you may lose money. The value of the Fund&#8217;s holdings may decline, and the Fund&#8217;s net asset value (NAV) and Fund share price may go down.<br/><br/><b>Active Management Risk.</b> Due to its active management, the Fund could underperform its benchmark index and/or other funds with a similar investment objective. The Fund may fail to achieve its investment objective and you may lose money.<br/><br/><b>Derivatives Risk.</b> Losses involving derivative instruments may be substantial, because a relatively small price movement in the underlying security(ies), instrument, commodity, currency or index may result in a substantial loss for the Fund. In addition to the potential for increased losses, the use of derivative instruments may lead to increased volatility within the Fund. Derivatives will typically increase the Fund&#8217;s exposure to principal risks to which it is otherwise exposed, and may expose the Fund to additional risks, including correlation risk, counterparty risk, hedging risk, leverage risk and liquidity risk. Below is more detailed information on certain derivatives expected to be utilized by the Fund.<br/><br/><b>Derivatives Risk/Forward Foreign Currency Contracts Risk.</b> These instruments are a type of derivative contract whereby the Fund may agree to buy or sell a country&#8217;s or region&#8217;s currency at a specific price on a specific date in the future. These contracts may fall in value due to foreign market downswings or foreign currency value fluctuations. The Fund&#8217;s investment or hedging strategies may not achieve their objective. Investment in these instruments also subjects the Fund to counterparty risk.<br/><br/><b>Derivatives Risk/Futures Contracts Risk.</b> The loss that may be incurred in entering into futures contracts may exceed the amount of the premium paid and may be potentially unlimited. Futures markets are highly volatile and the use of futures may increase the volatility of the Fund&#8217;s net asset value (NAV). Additionally, as a result of the low collateral deposits normally involved in futures trading, a relatively small price movement in a futures contract may result in substantial losses to the Fund. Futures contracts may be illiquid. Furthermore, exchanges may limit fluctuations in futures contract prices during a trading session by imposing a maximum permissible price movement on each futures contract. The Fund may be disadvantaged if it is prohibited from executing a trade outside the daily permissible price movement. Futures contracts executed on foreign exchanges may not provide the same protection as U.S. exchanges. These transactions involve additional risks, including counterparty risk, hedging risk and pricing risk.<br/><br/><b>Derivatives Risk/Options Risk.</b> If the Fund sells a put option, there is a risk that the Fund may be required to buy the underlying asset at a disadvantageous price. If the Fund sells a call option, there is a risk that the Fund may be required to sell the underlying asset at a disadvantageous price, and if the call option sold is not covered (for example, by owning the underlying asset), the Fund's losses are potentially unlimited. These transactions involve other risks, including counterparty risk and hedging risk.<br/><br/><b>Emerging Market Securities Risk.</b> Securities issued by foreign governments or companies in emerging market countries are more likely to have greater exposure to the risks of investing in foreign securities that are described in Foreign Securities Risk. In addition, emerging market countries are more likely to experience instability resulting, for example, from rapid changes or developments in social, political and economic conditions. Their economies are usually less mature and their securities markets are typically less developed with more limited trading activity (i.e., lower trading volumes and less liquidity) than more developed countries. Emerging market securities tend to be more volatile than securities in more developed markets. Many emerging market countries are heavily dependent on international trade and have fewer trading partners, which makes them more sensitive to world commodity prices and economic downturns in other countries, and some have a higher risk of currency devaluations.<br/><br/><b>Foreign Currency Risk.</b> The performance of the Fund may be materially affected positively or negatively by foreign currency strength or weakness relative to the U.S. dollar, particularly if the Fund invests a significant percentage of its assets in foreign securities or other assets denominated in currencies other than the U.S. dollar.<br/><br/><b>Foreign Securities Risk.</b> Investments in foreign securities involve certain risks not associated with investments in securities of U.S. companies. Foreign securities subject the Fund to the risks associated with investing in the particular country, including the political, regulatory, economic, social, diplomatic and other conditions or events occurring in the country or region, as well as fluctuations in its currency and the risks associated with less developed custody and settlement practices. Foreign securities may be more volatile and less liquid than investments in securities of U.S. companies.<br/><br/><b>Frequent Trading Risk.</b> &nbsp;The portfolio managers may actively and frequently trade investments in the Fund's portfolio to carry out its investment strategies. Frequent trading of investments increases the possibility that the Fund, as relevant, will realize taxable capital gains (including short-term capital gains, which are generally taxable to shareholders at higher rates than long-term capital gains for U.S. federal income tax purposes), which could reduce the Fund's after-tax return. Frequent trading can also mean higher brokerage and other transaction costs, which could reduce the Fund's return. The trading costs and tax effects associated with portfolio turnover may adversely affect the Fund&#8217;s performance.<br/><br/><b>Geographic Concentration Risk/Europe Risk.</b> The Fund may be particularly susceptible to economic, political, regulatory or other events or conditions affecting issuers and countries in Europe. Currency devaluations could occur in countries that have not yet experienced currency devaluation to date, or could continue to occur in countries that have already experienced such devaluations. In addition, the private and public sectors&#8217; debt problems of a single EU country can pose significant economic risks to the EU as a whole. As a result, the Fund may be more volatile than a more geographically diversified fund. If securities of issuers in Europe fall out of favor, it may cause the Fund to underperform other funds that do not concentrate in this region of the world.<br/><br/><b>Growth Securities Risk.</b> Growth securities typically trade at a higher multiple of earnings than other types of equity securities. Accordingly, the market values of growth securities may be more sensitive to adverse economic or other circumstances or changes in current or expected earnings than the market values of other types of securities. In addition, growth securities, at times, may not perform as well as value securities or the stock market in general, and may be out of favor with investors for varying periods of time.<br/><br/><b>Issuer Risk.</b> An issuer in which the Fund invests may perform poorly, and therefore, the value of its securities may decline, which would negatively affect the Fund&#8217;s performance. Poor performance may be caused by poor management decisions, competitive pressures, breakthroughs in technology, reliance on suppliers, labor problems or shortages, corporate restructurings, fraudulent disclosures, natural disasters or other events, conditions or factors.<br/><br/><b>Market Risk.</b> Market risk refers to the possibility that the market values of securities or other investments that the Fund holds will fall, sometimes rapidly or unpredictably, or fail to rise. An investment in the Fund could lose money over short or even long periods. In general, equity securities tend to have greater price volatility than debt securities.<br/><br/><b>Small- and Mid-Cap Company Securities Risk.</b> Investments in small- and mid-capitalization companies (small- and mid-cap companies) often involve greater risks than investments in larger, more established companies (larger companies) because small- and mid-cap companies tend to have less predictable earnings and may lack the management experience, financial resources, product diversification and competitive strengths of larger companies, and securities of small- and mid-cap companies may be less liquid and more volatile than the securities of larger companies.<b>Fees and Expenses of the Fund</b><div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualTotalReturnsColumbiaMidCapIndexFundBarChart column period compact * ~</div>
<b>Performance Information</b><b>Summary of the Fund </b><b>Investment Objective</b>Columbia Marsico International Opportunities Fund (the Fund) seeks long-term growth of capital.<b>Fees and Expenses of the Fund</b>This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 19 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) under <b>Sales Charge Waivers</b> beginning on page S-1.<b>Shareholder Fees (fees paid directly from your investment)</b>You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 21 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) under <b>Sales Charge Waivers</b> beginning on page S-1.5000000000000<b>Summary of the Fund</b><b>Investment Objective</b>Columbia Marsico Growth Fund (the Fund) seeks long-term growth of capital.<b>Fees and Expenses of the Fund </b>0.0575000000This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 18 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) under <b>Sales Charge Waivers</b> beginning on page S-1.<b>Shareholder Fees (fees paid directly from your investment)</b><b>Example</b>The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example illustrates the hypothetical expenses that you would incur over the time periods indicated, and assumes that:<ul type="square"><li style="margin-left:-20px">you invest $10,000 in the applicable class of Fund shares for the periods indicated,</li></ul><ul type="square"><li style="margin-left:-20px">your investment has a 5% return each year, and</li></ul><ul type="square"><li style="margin-left:-20px">the Fund&#8217;s total annual operating expenses remain the same as shown in the Annual Fund Operating Expenses table above.</li></ul>Although your actual costs may be higher or lower, based on the assumptions listed above, your costs would be:<b>Portfolio Turnover</b>There is no assurance that the Fund will achieve its investment objective and you may lose money.The Fund may pay transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 90% of the average value of its portfolio.0.01<b>Shareholder Fees (fees paid directly from your investment)</b>0.050.010000<b>Principal Investment Strategies</b>Under normal circumstances, the Fund invests primarily in equity securities of large-capitalization companies that have market capitalizations of $5 billion or more at the time of purchase. The Fund generally holds a core position of between 35 and 50 common stocks. The number of securities held by the Fund occasionally may exceed this range, such as when the Fund is accumulating new positions, phasing out and replacing existing positions, or responding to exceptional market conditions. The Fund may invest up to 25% in foreign securities, including in emerging market securities.<br/><br/>The core investments of the Fund (i.e., the primary investments held by the Fund over time) generally may include established companies and securities that are expected to offer long-term growth potential. However, the Fund's portfolio also may typically include securities of less mature companies, securities with more aggressive growth characteristics, and securities of companies undergoing significant positive developments, such as, without limitation, the introduction of a new product line, the appointment of a new management team, or an acquisition.<b>Principal Risks </b>An investment in the Fund involves risk, including those described below. There is no assurance that the Fund will achieve its investment objective and you may lose money. The value of the Fund&#8217;s holdings may decline, and the Fund&#8217;s net asset value (NAV) and Fund share price may go down.<br/><br/><b>Active Management Risk.</b> Due to its active management, the Fund could underperform its benchmark index and/or other funds with a similar investment objective. The Fund may fail to achieve its investment objective and you may lose money.<br/><br/><b>Emerging Market Securities Risk.</b> Securities issued by foreign governments or companies in emerging market countries are more likely to have greater exposure to the risks of investing in foreign securities that are described in Foreign Securities Risk. In addition, emerging market countries are more likely to experience instability resulting, for example, from rapid changes or developments in social, political and economic conditions. Their economies are usually less mature and their securities markets are typically less developed with more limited trading activity (i.e., lower trading volumes and less liquidity) than more developed countries. Emerging market securities tend to be more volatile than securities in more developed markets. Many emerging market countries are heavily dependent on international trade and have fewer trading partners, which makes them more sensitive to world commodity prices and economic downturns in other countries, and some have a higher risk of currency devaluations.<br/><br/><b>Foreign Currency Risk.</b> The performance of the Fund may be materially affected positively or negatively by foreign currency strength or weakness relative to the U.S. dollar, particularly if the Fund invests a significant percentage of its assets in foreign securities or other assets denominated in currencies other than the U.S. dollar.<br/><br/><b>Foreign Securities Risk.</b> Investments in foreign securities involve certain risks not associated with investments in securities of U.S. companies. Foreign securities subject the Fund to the risks associated with investing in the particular country, including the political, regulatory, economic, social, diplomatic and other conditions or events occurring in the country or region, as well as fluctuations in its currency and the risks associated with less developed custody and settlement practices. Foreign securities may be more volatile and less liquid than investments in securities of U.S. companies.<br/><br/><b>Growth Securities Risk.</b> Growth securities typically trade at a higher multiple of earnings than other types of equity securities. Accordingly, the market values of growth securities may be more sensitive to adverse economic or other circumstances or changes in current or expected earnings than the market values of other types of securities. In addition, growth securities, at times, may not perform as well as value securities or the stock market in general, and may be out of favor with investors for varying periods of time.<br/><br/><b>Issuer Risk.</b> An issuer in which the Fund invests may perform poorly, and therefore, the value of its securities may decline, which would negatively affect the Fund&#8217;s performance. Poor performance may be caused by poor management decisions, competitive pressures, breakthroughs in technology, reliance on suppliers, labor problems or shortages, corporate restructurings, fraudulent disclosures, natural disasters or other events, conditions or factors.<br/><br/><b>Market Risk.</b> Market risk refers to the possibility that the market values of securities or other investments that the Fund holds will fall, sometimes rapidly or unpredictably, or fail to rise. An investment in the Fund could lose money over short or even long periods. In general, equity securities tend to have greater price volatility than debt securities.<br/><br/><b>Sector Risk.</b> At times, the Fund may have a significant portion of its assets invested in securities of companies conducting business in a related group of industries within an economic sector. Companies in the same economic sector may be similarly affected by economic, regulatory, political or market events or conditions, making the Fund more vulnerable to unfavorable developments in that economic&nbsp; sector than funds that invest more broadly. The more a fund diversifies its investments, the more it spreads risk and potentially reduces the risks of loss and volatility.<br/><br/><b>Small- and Mid-Cap Company Securities Risk.</b> Investments in small- and mid-capitalization companies (small- and mid-cap companies) often involve greater risks than investments in larger, more established companies (larger companies) because small- and mid-cap companies tend to have less predictable earnings and may lack the management experience, financial resources, product diversification and competitive strengths of larger companies, and securities of small- and mid-cap companies may be less liquid and more volatile than the securities of larger companies.This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.<b>Performance Information</b>The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower. Class A share performance (without sales charges) is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.<br/><br/>The performance of one or more share classes shown in the table below begins before the indicated inception date for such share class. The returns shown for each such share class include the returns of the Fund&#8217;s Class A shares (without applicable sales charges and adjusted to reflect the higher class-related operating expenses of such classes, where applicable) for periods prior to its inception date. Except for differences in annual returns resulting from differences in expenses and sales charges (where applicable), the share classes of the Fund would have substantially similar annual returns because all share classes of the Fund invest in the same portfolio of securities.<br/><br/>The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Your actual after-tax returns will depend on your personal tax situation and may differ from those shown in the table. In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs). The after-tax returns are shown only for Class A shares and will vary for other share classes. Returns after taxes on distributions and sale of Fund shares are higher than before-tax returns for certain periods shown because they reflect the tax benefit of capital losses realized on the redemption of Fund shares. After-tax returns are shown for Class A shares because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public.<br/><br/><b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b> Updated performance information can be obtained by calling toll-free 800.345.6611 or visiting columbiamanagement.com.<b>Year by Year Total Return (%)<br/> as of December 31 Each Year</b><b>Best and Worst Quarterly Returns <br/>During the Period Shown in the Bar Chart</b> <br/><br/>Best&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3rd Quarter 2009 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;15.92%<br/><br/><br/>Worst&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4th Quarter 2008 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-22.85%<b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)</b>0.0575000000.0575000<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualFundOperatingExpensesColumbiaMidCapIndexFund column period compact * ~</div>
0.010.050.01000The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower. Class A share performance (without sales charges) is shown in the bar chart because the Fund has less than ten calendar years of performance and Class A shares are at least as old as any other share class of the Fund. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.<br/><br/>The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Your actual after-tax returns will depend on your personal tax situation and may differ from those shown in the table. In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs). The after-tax returns are shown only for Class A shares and will vary for other share classes. Returns after taxes on distributions and sale of Fund shares are higher than before-tax returns for certain periods shown because they reflect the tax benefit of capital losses realized on the redemption of Fund shares. After-tax returns are shown for Class A shares because the Fund has less than ten calendar years of performance and Class A shares are at least as old as any other share class of the Fund.<br/><br/><b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b> Updated performance information can be obtained by calling toll-free 800.345.6611 or visiting columbiamanagement.com.0.010.050.010<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleShareholderFeesColumbiaMidCapIndexFund column period compact * ~</div>
The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower. Class A share performance (without sales charges) is shown in the bar chart because the Fund has less than ten calendar years of performance and Class A shares are at least as old as any other share class of the Fund. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.800.345.6611columbiamanagement.com000000000.00650.00650.00650.00650.00650.0065<b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b>0.00250.010.010000.00280.00280.00070.00280.00280.0028<b>Year by Year Total Return (%)<br/>as of December 31 Each Year</b>0.01180.01930.01930.00720.00930.00936886962967495959289066062302962960118712421042401515515019242059225489411431143The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower.196688196749595928606606230296296118710421042401515515192420592254894114311430.0010.0010.0010.0010.31340.10670.00250000.09590.08350.13180.00310.00120.00170.0031<b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)</b>-0.39770.3022<b>Best and Worst Quarterly Returns <br/>During the Period Shown in the Bar Chart</b> <br/><br/>Best&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1st Quarter 2012&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 21.68%<br/><br/><br/>Worst&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3rd Quarter 2011&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -20.45%0.1852-0.02650.11790.05360.0210.07590.06550.12240.10080.11810.12080.16-0.0095-0.0163-0.0084-0.0081-0.00510.00490.00230.00490.01660.00620.00620.00620.00620.00620.00620.00620.00620.00620.06420.06040.05640.06240.06250.07190.07050.07310.0711997-12-311997-12-311997-12-311997-12-311997-12-312010-09-272012-11-081997-12-310.00250.010.0100.005000.002500.33940.00310.00310.00310.00090.00310.00310.00140.00310.00310.242-0.12280.20280.01180.01930.01930.00710.01430.00930.00760.01180.00930.00010.00010.00010.00010.00670.00230.00280.00420.00790.00790.00790.00790.00790.00790.00790.00250.010.0100.00500-0.0021-0.0002-0.0007-0.0021Year to Date return2013-03-310.0824Best2012-03-310.2168Worst0.00460.00210.00210.00212011-09-30-0.20450.00330.00330.00330.00140.00330.00330.00330.01370.02120.02120.00930.01620.01120.01120.28650.15390.0585<b>Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)</b>0.06860.1398-0.42030.29080.1944-0.01770.1229The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs).The after-tax returns are shown only for Class A shares and will vary for other share classes.Returns after taxes on distributions and sale of Fund shares are higher than before-tax returns for certain periods shown because they reflect the tax benefit of capital losses realized on the redemption of Fund shares.0.13410.08710.13410.18450.20050.20650.1613-0.0012-0.0019-0.00110.0040.0090.014-0.00322008-04-302008-04-302008-04-302008-04-302008-04-302008-04-301997-12-311997-12-311997-12-311997-12-311997-12-312010-09-272006-01-232012-11-082010-09-271997-12-310.05830.05780.03850.06380.10420.1270.11950.12290.12260.12480.16-0.0146-0.0149-0.0124-0.0143-0.0103-0.0006-0.0054-0.0029-0.0028-0.00040.01660.05930.05910.05210.05750.05760.06670.06550.06270.06820.06560.0712012-11-080.1231-0.00280.0656This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months of purchase, as follows: 1.00% if redeemed within 12 months of purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.This charge applies to redemptions within one year of purchase, with certain limited exceptions.<b>Summary of the Fund</b><b>Investment Objective</b>Columbia Marsico Focused Equities Fund (the Fund) seeks long-term growth of capital.<b>Fees and Expenses of the Fund</b>This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 19 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) <b>under Sales Charge Waivers</b> beginning on page S-1.<b>Summary of the Fund</b>You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 19 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) <b>under Sales Charge Waivers</b> beginning on page S-1.50000<b>Investment Objective</b><b>Shareholder Fees (fees paid directly from your investment)</b><b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)</b><b>Example </b>Columbia Large Cap Index Fund (the Fund) seeks total return before fees and expenses that corresponds to the total return of the Standard &amp; Poor&#8217;s (S&amp;P) 500<sup style="FONT-SIZE: 85%; VERTICAL-ALIGN: text-top">&#174;</sup> Index.<b>Fees and Expenses of the Fund</b>This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.<b>Shareholder Fees (fees paid directly from your investment)</b>0000000.05000<b>Summary of the Fund</b><b>Investment Objective</b>Columbia Large Cap Enhanced Core Fund (the Fund) seeks total return before fees and expenses that exceeds the total return of the Standard &amp; Poor's (S&amp;P) 500<sup>&#174;</sup> Index.<b>Fees and Expenses of the Fund</b>This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.<b>Shareholder Fees (fees paid directly from your investment)</b><b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)</b><b>Example</b>The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example illustrates the hypothetical expenses that you would incur over the time periods indicated, and assumes that: <ul type="square"><li style="margin-left:-20px">you invest $10,000 in the applicable class of Fund shares for the periods indicated,</li></ul><ul type="square"><li style="margin-left:-20px">your investment has a 5% return each year, and</li></ul><ul type="square"><li style="margin-left:-20px">the Fund&#8217;s total annual operating expenses remain the same as shown in the Annual Fund Operating Expenses table above.</li></ul>Since the waivers and/or reimbursements shown in the Annual Fund Operating Expenses table above expire as indicated in the preceding table, they are only reflected in the examples for the applicable time periods. Although your actual costs may be higher or lower, based on the assumptions listed above, your costs would be:<b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)</b><b>Portfolio Turnover</b>The Fund may pay transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 92% of the average value of its portfolio.<b>Principal Investment Strategies</b>0.0010.0010.0010.0010.001Under normal circumstances, the Fund invests at least 80% of its net assets (including the amount of any borrowings for investment purposes) in common stocks that comprise the S&amp;P 500 Index (the Index), convertible securities that are convertible into stocks included in the Index, and derivatives whose returns are closely equivalent to the returns of the Index or its components.<br/><br/>The Fund primarily invests in securities included in the Index but generally holds fewer stocks than the Index and may hold securities that are not in the Index.<br/><br/>Although the Fund&#8217;s investment manager attempts to maintain a portfolio that generally matches the risk characteristics of the Index, it will vary the number and percentages of the Fund&#8217;s holdings in attempting to provide higher returns than the Index and to reduce the potential of underperforming the Index over time. The Fund may from time to time emphasize one or more economic sectors in selecting its investments.<br/><br/>In pursuit of the Fund&#8217;s objective, the portfolio managers use quantitative analysis to evaluate the relative attractiveness of potential investments.<br/><br/>The Fund may invest in derivatives, such as futures contracts, for investment purposes, for risk management (hedging) purposes and to increase investment flexibility.<b>Principal Risks</b>An investment in the Fund involves risk, including those described below. There is no assurance that the Fund will achieve its investment objective and you may lose money. The value of the Fund&#8217;s holdings may decline, and the Fund&#8217;s net asset value (NAV) and Fund share price may go down.<br/><br/><b>Active Management Risk.</b> Although the Fund is managed based primarily on quantitative methods, the Investment Manager conducts a qualitative review of the quantitative output. Therefore, the Fund&#8217;s performance will reflect, in part, the ability of the Investment Manager to make active, qualitative decisions, including allocation decisions that seek to achieve the Fund&#8217;s investment objective.<br/><br/><b>Derivatives Risk.</b> Losses involving derivative instruments may be substantial, because a relatively small price movement in the underlying security(ies), instrument, commodity, currency or index may result in a substantial loss for the Fund. In addition to the potential for increased losses, the use of derivative instruments may lead to increased volatility within the Fund. Derivatives will typically increase the Fund&#8217;s exposure to principal risks to which it is otherwise exposed, and may expose the Fund to additional risks, including correlation risk, counterparty risk, hedging risk, leverage risk and liquidity risk. Below is more detailed information on certain derivatives expected to be utilized by the Fund.<br/><br/><b>Derivatives Risk/Futures Contracts Risk.</b> The loss that may be incurred in entering into futures contracts may exceed the amount of the premium paid and may be potentially unlimited. Futures markets are highly volatile and the use of futures may increase the volatility of the Fund&#8217;s net asset value (NAV). Additionally, as a result of the low collateral deposits normally involved in futures trading, a relatively small price movement in a futures contract may result in substantial losses to the Fund. Futures contracts may be illiquid. Furthermore, exchanges may limit fluctuations in futures contract prices during a trading session by imposing a maximum permissible price movement on each futures contract. The Fund may be disadvantaged if it is prohibited from executing a trade outside the daily permissible price movement. Futures contracts executed on foreign exchanges may not provide the same protection as U.S. exchanges. These transactions involve additional risks, including counterparty risk, hedging risk and pricing risk.<br/><br/><b>Index Risk.</b> The Fund's value will generally decline when the performance of its targeted index declines. In addition, because the Fund may not hold all issues included in its index, it may not always be fully invested. The Fund also bears advisory, administrative and other expenses and transaction costs in trading securities, which the index does not bear. Accordingly, the Fund's performance will likely fail to match the performance of its targeted index, after taking expenses into account. It is not possible to invest directly in an index.<br/><br/><b>Issuer Risk.</b> An issuer in which the Fund invests may perform poorly, and therefore, the value of its securities may decline, which would negatively affect the Fund&#8217;s performance. Poor performance may be caused by poor management decisions, competitive pressures, breakthroughs in technology, reliance on suppliers, labor problems or shortages, corporate restructurings, fraudulent disclosures, natural disasters or other events, conditions or factors.<br/><br/><b>Market Risk.</b> Market risk refers to the possibility that the market values of securities or other investments that the Fund holds will fall, sometimes rapidly or unpredictably, or fail to rise. An investment in the Fund could lose money over short or even long periods. In general, equity securities tend to have greater price volatility than debt securities.<br/><br/><b>Quantitative Model Risk.</b> Investments selected using quantitative methods may perform differently from the market as a whole. There can be no assurance that these methodologies will enable the Fund to achieve its objective.<br/><br/><b>Sector Risk.</b> At times, the Fund may have a significant portion of its assets invested in securities of companies conducting business in a related group of industries within an economic sector. Companies in the same economic sector may be similarly affected by economic, regulatory, political or market events or conditions, making the Fund more vulnerable to unfavorable developments in that economic &nbsp;sector than funds that invest more broadly. The more a fund diversifies its investments, the more it spreads risk and potentially reduces the risks of loss and volatility.<b>Performance Information</b>The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance has varied for each full calendar year shown. The table below the bar chart compares the Fund&#8217;s returns for the periods shown with benchmark performance.<br/><br/>Class A share performance is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The performance of one or more share classes shown in the table below begins before the indicated inception date for such share class. The returns shown for each such share class include the returns of the Fund&#8217;s Class A shares (adjusted to reflect the higher class-related operating expenses of such classes, where applicable) for periods prior to its inception date.<br/>Except for differences in annual returns resulting from differences in expenses (where applicable), the share classes of the Fund would have substantially similar annual returns because all share classes of the Fund invest in the same portfolio of securities.<br/><br/>The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Your actual after-tax returns will depend on your personal tax situation and may differ from those shown in the table. In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs). The after-tax returns are shown only for Class A shares and will vary for other share classes. After-tax returns are shown for Class A shares because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public.<br/><br/><b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b> Updated performance information can be obtained by calling toll-free 800.345.6611 or visiting columbiamanagement.com.<b>Year by Year Total Return (%)<br/>as of December 31 Each Year</b><b>Best and Worst Quarterly Returns <br/>During the Period Shown in the Bar Chart</b> <br/><br/>Best&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2nd Quarter 2009&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 15.66%<br/><br/><br/>Worst&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4th Quarter 2008&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -21.41%<b>Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)</b>0.00250.010000.0010.0010.0010.0010.001000000.00450.0120.0020.0020.0020000This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months of purchase, as follows: 1.00% if redeemed within 12 months of purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.This charge decreases over time.This charge applies to redemptions within one year of purchase, with certain limited exceptions.<b>Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)</b>Management fees have been restated to reflect contractual changes to the investment management fee rates. Other expenses have been restated to reflect contractual changes to certain fees paid by the Fund.The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example illustrates the hypothetical expenses that you would incur over the time periods indicated, and assumes that:<ul type="square"><li style="margin-left:-20px">you invest $10,000 in the applicable class of Fund shares for the periods indicated,</li></ul><ul type="square"><li style="margin-left:-20px">your investment has a 5% return each year, and</li></ul><ul type="square"><li style="margin-left:-20px">the Fund&#8217;s total annual operating expenses remain the same as shown in the Annual Fund Operating Expenses table above.</li></ul>Although your actual costs may be higher or lower, based on the assumptions listed above, your costs would be:0.9You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 18 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) under <b>Sales Charge Waivers</b> beginning on page S-1.50000other expenses for Class R4 and Class R5 are based on estimated amounts for the Fund&#8217;s current fiscal year.0.00690.00690.00690.00690.0069000.00500.0025<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleShareholderFeesColumbiaMarsicoFocusedEquitiesFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualFundOperatingExpensesColumbiaMarsicoFocusedEquitiesFund column period compact * ~</div>
0.00350.00150.00350.00150.0035Management fees have been restated to reflect contractual changes to the investment management fee rates. Other expenses for Class A, Class B, Class C and Class Z have been restated to reflect contractual changes to certain fees paid by the FundManagement fees have been restated to reflect contractual changes to the investment management fee rates. Other expenses for Class A, Class B, Class C, Class I, Class R, Class W and Class Z have been restated to reflect contractual changes to certain fees paid by the Fund0.01040.00840.01540.00840.0129<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleTransposedColumbiaMarsicoFocusedEquitiesFund column period compact * ~</div>
other expenses for Class R4 are based on estimated amounts for the Fund's current fiscal year.There is no assurance that the Fund will achieve its investment objective and you may lose money.-0.0039-0.0035-0.0039-0.0035-0.0039<b>Example</b>The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower. Class A share performance (without sales charges) is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.800.345.6611<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleNoRedemptionTransposedColumbiaMarsicoFocusedEquitiesFund column period compact * ~</div>
0.00490.00650.00490.01150.009columbiamanagement.comThe following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example illustrates the hypothetical expenses that you would incur over the time periods indicated, and assumes that:<ul type="square"><li style="margin-left:-20px">you invest $10,000 in the applicable class of Fund shares for the periods indicated,</li></ul><ul type="square"><li style="margin-left:-20px">your investment has a 5% return each year, and</li></ul><ul type="square"><li style="margin-left:-20px">the Fund&#8217;s total annual operating expenses remain the same as shown in the Annual Fund Operating Expenses table above.</li></ul>Although your actual costs may be higher or lower, based on the assumptions listed above, your costs would be:<b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b><b>Portfolio Turnover</b>The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs).The after-tax returns are shown only for Class A shares and will vary for other share classes.<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleShareholderFeesColumbiaMarsicoGrowthFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualTotalReturnsColumbiaMarsicoFocusedEquitiesFundBarChart column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualFundOperatingExpensesColumbiaMarsicoGrowthFund column period compact * ~</div>
The Fund may pay transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 76% of the average value of its portfolio.<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleTransposedColumbiaMarsicoGrowthFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAverageAnnualTotalReturnsTransposedColumbiaMarsicoFocusedEquitiesFund column period compact * ~</div>
0.76<b>Principal Investment Strategies</b><div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleNoRedemptionTransposedColumbiaMarsicoGrowthFund column period compact * ~</div>
Under normal circumstances, the Fund invests at least 80% of its net assets in equity securities. These investments mostly consist of equity securities of large-capitalization companies that have market capitalizations of $5 billion or more at the time of purchase. The Fund, which is non-diversified, generally will hold a core position of between 20 and 35 common stocks that are believed to have potential for long-term growth. The number of securities held by the Fund occasionally may exceed this range, such as when the Fund is accumulating new positions, phasing out and replacing existing positions, or responding to exceptional market conditions. The Fund may invest up to 25% in foreign securities, including in emerging market securities.<br/><br/> The core investments of the Fund (i.e., the primary investments held by the Fund over time) generally may include established companies and securities that are expected to offer long-term growth potential. However, the Fund's portfolio also may typically include securities of less mature companies, securities with more aggressive growth characteristics, and securities of companies undergoing significant positive developments, such as, without limitation, the introduction of a new product line, the appointment of a new management team, or an acquisition.<b>Principal Risks</b>An investment in the Fund involves risk, including those described below. There is no assurance that the Fund will achieve its investment objective and you may lose money. The value of the Fund&#8217;s holdings may decline, and the Fund&#8217;s net asset value (NAV) and Fund share price may go down.<br/><br/><b>Active Management Risk.</b> Due to its active management, the Fund could underperform its benchmark index and/or other funds with a similar investment objective. The Fund may fail to achieve its investment objective and you may lose money.<br/><br/><b>Emerging Market Securities Risk.</b> Securities issued by foreign governments or companies in emerging market countries are more likely to have greater exposure to the risks of investing in foreign securities that are described in Foreign Securities Risk. In addition, emerging market countries are more likely to experience instability resulting, for example, from rapid changes or developments in social, political and economic conditions. Their economies are usually less mature and their securities markets are typically less developed with more limited trading activity (i.e., lower trading volumes and less liquidity) than more developed countries. Emerging market securities tend to be more volatile than securities in more developed markets. Many emerging market countries are heavily dependent on international trade and have fewer trading partners, which makes them more sensitive to world commodity prices and economic downturns in other countries, and some have a higher risk of currency devaluations.<br/><br/><b>Foreign Currency Risk.</b> The performance of the Fund may be materially affected positively or negatively by foreign currency strength or weakness relative to the U.S. dollar, particularly if the Fund invests a significant percentage of its assets in foreign securities or other assets denominated in currencies other than the U.S. dollar.<br/><br/><b>Foreign Securities Risk.</b> Investments in foreign securities involve certain risks not associated with investments in securities of U.S. companies. Foreign securities subject the Fund to the risks associated with investing in the particular country, including the political, regulatory, economic, social, diplomatic and other conditions or events occurring in the country or region, as well as fluctuations in its currency and the risks associated with less developed custody and settlement practices. Foreign securities may be more volatile and less liquid than investments in securities of U.S. companies.<br/><br/><b>Growth Securities Risk.</b> Growth securities typically trade at a higher multiple of earnings than other types of equity securities. Accordingly, the market values of growth securities may be more sensitive to adverse economic or other circumstances or changes in current or expected earnings than the market values of other types of securities. In addition, growth securities, at times, may not perform as well as value securities or the stock market in general, and may be out of favor with investors for varying periods of time.<br/><br/><b>Issuer Risk.</b> An issuer in which the Fund invests may perform poorly, and therefore, the value of its securities may decline, which would negatively affect the Fund&#8217;s performance. Poor performance may be caused by poor management decisions, competitive pressures, breakthroughs in technology, reliance on suppliers, labor problems or shortages, corporate restructurings, fraudulent disclosures, natural disasters or other events, conditions or factors.<br/><br/><b>Market Risk.</b> Market risk refers to the possibility that the market values of securities or other investments that the Fund holds will fall, sometimes rapidly or unpredictably, or fail to rise. An investment in the Fund could lose money over short or even long periods. In general, equity securities tend to have greater price volatility than debt securities.<br/><br/><b> Non-Diversified Fund &nbsp;Risk.</b> The Fund is non-diversified, which generally means that it will invest a greater percentage of its total assets in the securities of fewer issuers than a &#8220;diversified&#8221; fund. This increases the risk that a change in the value of any one investment held by the Fund could affect the overall value of the Fund more than it would affect that of a diversified fund holding a greater number of investments. Accordingly, the Fund's value will likely be more volatile than the value of a more diversified fund.<br/><br/><b>Sector Risk.</b> At times, the Fund may have a significant portion of its assets invested in securities of companies conducting business in a related group of industries within an economic sector. Companies in the same economic sector may be similarly affected by economic, regulatory, political or market events or conditions, making the Fund more vulnerable to unfavorable developments in that economic sector than funds that invest more broadly. The more a fund diversifies its investments, the more it spreads risk and potentially reduces the risks of loss and volatility.<br/><br/><b>Small- and Mid-Cap Company Securities Risk.</b> Investments in small- and mid-capitalization companies (small- and mid-cap companies) often involve greater risks than investments in larger, more established companies (larger companies) because small- and mid-cap companies tend to have less predictable earnings and may lack the management experience, financial resources, product diversification and competitive strengths of larger companies, and securities of small- and mid-cap companies may be less liquid and more volatile than the securities of larger companies.<b> Non-Diversified Fund &nbsp;Risk.</b> The Fund is non-diversified, which generally means that it will invest a greater percentage of its total assets in the securities of fewer issuers than a &#8220;diversified&#8221; fund. This increases the risk that a change in the value of any one investment held by the Fund could affect the overall value of the Fund more than it would affect that of a diversified fund holding a greater number of investments. Accordingly, the Fund's value will likely be more volatile than the value of a more diversified fund.<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualTotalReturnsColumbiaMarsicoGrowthFundBarChart column period compact * ~</div>
There is no assurance that the Fund will achieve its investment objective and you may lose money.<b>Performance Information</b>The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower. Class A share performance (without sales charges) is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.<br/><br/> The performance of one or more share classes shown in the table below begins before the indicated inception date for such share class. The returns shown for each such share class include the returns of the Fund&#8217;s Class A shares (without applicable sales charges and adjusted to reflect the higher class-related operating expenses of such classes, where applicable) for periods prior to its inception date. Except for differences in annual returns resulting from differences in expenses and sales charges (where applicable), the share classes of the Fund would have substantially similar annual returns because all share classes of the Fund invest in the same portfolio of securities.<br/><br/>The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Your actual after-tax returns will depend on your personal tax situation and may differ from those shown in the table. In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs). The after-tax returns are shown only for Class A shares and will vary for other share classes. Returns after taxes on distributions and sale of Fund shares are higher than before-tax returns for certain periods shown because they reflect the tax benefit of capital losses realized on the redemption of Fund shares. After-tax returns are shown for Class A shares because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public.<br/><br/><b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b> Updated performance information can be obtained by calling toll-free 800.345.6611 or visiting columbiamanagement.com.<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAverageAnnualTotalReturnsTransposedColumbiaMarsicoGrowthFund column period compact * ~</div>
The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower. Class A share performance (without sales charges) is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower.The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs).<b>Example</b>The after-tax returns are shown only for Class A shares and will vary for other share classes.Returns after taxes on distributions and sale of Fund shares are higher than before-tax returns for certain periods shown because they reflect the tax benefit of capital losses realized on the redemption of Fund shares.<b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b>800.345.6611The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example illustrates the hypothetical expenses that you would incur over the time periods indicated, and assumes that:<ul type="square"><li style="margin-left:-20px">you invest $10,000 in the applicable class of Fund shares for the periods indicated,</li></ul><ul type="square"><li style="margin-left:-20px">your investment has a 5% return each year, and</li></ul><ul type="square"><li style="margin-left:-20px">the Fund&#8217;s total annual operating expenses remain the same as shown in the Annual Fund Operating Expenses table above.</li></ul>Although your actual costs may be higher or lower, based on the assumptions listed above, your costs would be:columbiamanagement.com70671531595165114114<b>Year by Year Total Return (%)<br/>as of December 31 Each Year</b><b>Best and Worst Quarterly Returns <br/>During the Period Shown in the Bar Chart</b> <br/><br/>Best&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1st Quarter 2012&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 16.15% <br/><br/><br/>Worst&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4th Quarter 2008&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -21.11%984964664296511356356<b>Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)</b>46622202020Year to Date return2013-03-310.1129128213391139515881617617Best2012-03-311446816464640.1615Worst21272261245211431922136313632008-12-31252860113113113-0.2111567124625525525592501175066365228443228287665426798426531151810001000179712319250117506636522844322828766542679842653146122202020151810001797100012311443816464642526601131131135671246255255255<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleShareholderFeesColumbiaMarsicoGlobalFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualFundOperatingExpensesColumbiaMarsicoGlobalFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleTransposedColumbiaMarsicoGlobalFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleNoRedemptionTransposedColumbiaMarsicoGlobalFund column period compact * ~</div>
0.29430.1023<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualTotalReturnsColumbiaMarsicoGlobalFundBarChart column period compact * ~</div>
0.0647<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAverageAnnualTotalReturnsTransposedColumbiaMarsicoGlobalFund column period compact * ~</div>
0.16420.0383-0.36730.23890.13010.04360.15780706215215951651141149846646642965113563561996-07-311996-07-311996-07-312010-09-272006-01-232009-07-151996-07-311282113911395158816176170.15780.15520.1060.16170.15520.16150.16120.162127226124521143192213631363<b>Example</b>0.01370.01140.01130.01520.01110.01620.01620.01660.06990.06050.05690.07070.06720.07120.07250.071<b>Portfolio Turnover</b>The Fund may pay transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 7% of the average value of its portfolio.<b>Principal Investment Strategies</b>Under normal circumstances, the Fund invests at least 80% of its net assets (including the amount of any borrowings for investment purposes) in common stocks that comprise the S&amp;P 500 Index (the Index). The Fund may invest in derivatives, consisting of stock index futures, as substitutes for the underlying securities in the Index.<br/><br/>Different common stocks have different weightings in the Index, depending on the amount of stock outstanding and the stock&#8217;s current price. In seeking to match the performance of the Index, Columbia Management Investment Advisers, LLC (the Investment Manager) attempts to allocate the Fund&#8217;s assets among common stocks in approximately the same weightings as the Index. This is referred to as a passive or indexing approach to investing. The Fund may buy shares of Ameriprise Financial, Inc., an affiliate of the Fund&#8217;s investment manager, which is currently included in the Index, subject to certain restrictions.<br/><br/>The Fund attempts to achieve at least a 95% correlation between the performance of the Index and the Fund&#8217;s investment results, before fees and expenses.<b>Principal Risks</b>An investment in the Fund involves risk, including those described below. There is no assurance that the Fund will achieve its investment objective and you may lose money. The value of the Fund&#8217;s holdings may decline, and the Fund&#8217;s net asset value (NAV) and Fund share price may go down.<br/><br/><b>Derivatives Risk.</b> Losses involving derivative instruments may be substantial, because a relatively small price movement in the underlying security(ies), instrument, commodity, currency or index may result in a substantial loss for the Fund. In addition to the potential for increased losses, the use of derivative instruments may lead to increased volatility within the Fund. Derivatives will typically increase the Fund&#8217;s exposure to principal risks to which it is otherwise exposed, and may expose the Fund to additional risks, including correlation risk, counterparty risk, hedging risk, leverage risk and liquidity risk. Below is more detailed information on certain derivatives expected to be utilized by the Fund.<br/><br/><b>Derivatives Risk/Futures Contracts Risk.</b> The loss that may be incurred in entering into futures contracts may exceed the amount of the premium paid and may be potentially unlimited. Futures markets are highly volatile and the use of futures may increase the volatility of the Fund&#8217;s net asset value (NAV). Additionally, as a result of the low collateral deposits normally involved in futures trading, a relatively small price movement in a futures contract may result in substantial losses to the Fund. Futures contracts may be illiquid. Furthermore, exchanges may limit fluctuations in futures contract prices during a trading session by imposing a maximum permissible price movement on each futures contract. The Fund may be disadvantaged if it is prohibited from executing a trade outside the daily permissible price movement. Futures contracts executed on foreign exchanges may not provide the same protection as U.S. exchanges. These transactions involve additional risks, including counterparty risk, hedging risk and pricing risk.<br/><br/><b>Index Risk.</b> The Fund's value will generally decline when the performance of its targeted index declines. In addition, because the Fund may not hold all issues included in its index, it may not always be fully invested. The Fund also bears advisory, administrative and other expenses and transaction costs in trading securities, which the index does not bear. Accordingly, the Fund's performance will likely fail to match the performance of its targeted index, after taking expenses into account. It is not possible to invest directly in an index.<br/><br/><b>Issuer Risk.</b> An issuer in which the Fund invests may perform poorly, and therefore, the value of its securities may decline, which would negatively affect the Fund&#8217;s performance. Poor performance may be caused by poor management decisions, competitive pressures, breakthroughs in technology, reliance on suppliers, labor problems or shortages, corporate restructurings, fraudulent disclosures, natural disasters or other events, conditions or factors.<br/><br/><b>Market Risk.</b> Market risk refers to the possibility that the market values of securities or other investments that the Fund holds will fall, sometimes rapidly or unpredictably, or fail to rise. An investment in the Fund could lose money over short or even long periods. In general, equity securities tend to have greater price volatility than debt securities.<br/><br/><b>Tracking Error Risk.</b> The Fund will not track its benchmark index perfectly and the Fund may not outperform the index. The tools that the Investment Manager uses to replicate the index are not perfect and the Fund&#8217;s performance may be impacted by the size of the Fund&#8217;s portfolio, the effectiveness of sampling techniques, transaction costs, management fees and expenses, brokerage commissions and fees, the extent and timing of cash flows in and out of the Fund and changes in the index.<b>Performance Information</b>The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance has varied for each full calendar year shown. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.<br/><br/>Class A share performance is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The performance of one or more share classes shown in the table below begins before the indicated inception date for such share class. The returns shown for each such share class include the returns of the Fund&#8217;s Class Z shares (adjusted to reflect the higher class-related operating expenses of such classes, where applicable) for periods prior to its inception date.<br/><br/>Except for differences in annual returns resulting from differences in expenses and sales charges (where applicable), the share classes of the Fund would have substantially similar annual returns because all share classes of the Fund invest in the same portfolio of securities.<br/><br/>The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Your actual after-tax returns will depend on your personal tax situation and may differ from those shown in the table. In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs). The after-tax returns are shown only for Class A shares and will vary for other share classes. After-tax returns are shown for Class A shares because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public.<br/><br/><b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b> Updated performance information can be obtained by calling toll-free 800.345.6611 or visiting columbiamanagement.com.<b>Year by Year Total Return (%)<br/>as of December 31 Each Year</b><b>Best and Worst Quarterly Returns <br/>During the Period Shown in the Bar Chart</b> <br/><br/>Best&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2nd Quarter 2009&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 15.80%<br/><br/><br/>Worst&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4th Quarter 2008&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -21.99%0.27980.10450.04510.15390.0512-0.37220.26030.14620.01730.1551<b>Portfolio Turnover</b>The Fund may pay transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 73% of the average value of its portfolio.<b>Principal Investment Strategies </b>The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example illustrates the hypothetical expenses that you would incur over the time periods indicated, and assumes that:<ul type="square"><li style="margin-left:-20px">you invest $10,000 in the applicable class of Fund shares for the periods indicated,</li></ul><ul type="square"><li style="margin-left:-20px">your investment has a 5% return each year, and</li></ul><ul type="square"><li style="margin-left:-20px">the Fund&#8217;s total annual operating expenses remain the same as shown in the Annual Fund Operating Expenses table above.</li></ul>Since the waivers and/or reimbursements shown in the Annual Fund Operating Expenses table above expire as indicated in the preceding table, they are only reflected in the 1 year example and the first year of the other examples. Although your actual costs may be higher or lower, based on the assumptions listed above, your costs would be:<b>Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)</b>Under normal circumstances, the Fund invests at least 65% of its total assets in common stocks of foreign companies. The Fund may invest in an unlimited number of companies of any size throughout the world that are selected for their long-term growth potential. The Fund normally invests in issuers from at least three different countries not including the United States. The Fund may invest in common stocks of companies operating in, or economically tied to, emerging market countries. Some issuers or securities in the Fund's portfolio may be based in, or economically tied to, the United States.<br/><br/>The Fund also may invest in foreign currency exchange contracts to convert foreign currencies to and from the U.S. dollar, and to hedge against changes in foreign currency exchange rates.<br/><br/>The core investments of the Fund (i.e., the primary investments held by the Fund over time) generally may include established companies and securities that are expected to offer long-term growth potential. However, the Fund's portfolio also may typically include securities of less mature companies, securities with more aggressive growth characteristics, and securities of companies undergoing significant positive developments, such as, without limitation, the introduction of a new product line, the appointment of a new management team, or an acquisition.<br/><br/>The Fund&#8217;s investment strategy may involve the frequent trading of portfolio securities. This may cause the Fund to incur higher transaction costs (which may adversely affect the Fund&#8217;s performance) and may increase taxable distributions for shareholders.0.15510.15150.10550.09610.15780.15760.15780.16<b>Principal Risks</b>0.01280.00990.01030.00140.01480.01530.01530.01660.06680.06360.05780.05890.06890.06950.06950.071June 30, 2014Other expenses have been restated to reflect contractual changes to certain fees paid by the Fund.0.92There is no assurance that the Fund will achieve its investment objective and you may lose money.800.345.6611columbiamanagement.com<b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b>The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs).The after-tax returns are shown only for Class A shares and will vary for other share classes.Year to Date return2013-03-310.1033Best2009-06-300.1566Worst2008-12-31-0.2141Year to Date return2013-03-310.1045Best2009-06-300.158Worst2008-12-31-0.2199An investment in the Fund involves risk, including those described below. There is no assurance that the Fund will achieve its investment objective and you may lose money. The value of the Fund&#8217;s holdings may decline, and the Fund&#8217;s net asset value (NAV) and Fund share price may go down.<br/><br/><b>Active Management Risk.</b> Due to its active management, the Fund could underperform its benchmark index and/or other funds with a similar investment objective. The Fund may fail to achieve its investment objective and you may lose money.<br/><br/><b>Derivatives Risk.</b> Losses involving derivative instruments may be substantial, because a relatively small price movement in the underlying security(ies), instrument, commodity, currency or index may result in a substantial loss for the Fund. In addition to the potential for increased losses, the use of derivative instruments may lead to increased volatility within the Fund. Derivatives will typically increase the Fund&#8217;s exposure to principal risks to which it is otherwise exposed, and may expose the Fund to additional risks, including correlation risk, counterparty risk, hedging risk, leverage risk and liquidity risk. Below is more detailed information on certain derivatives expected to be utilized by the Fund.<br/><br/><b>Derivatives Risk/Forward Foreign Currency Contracts Risk.</b> These instruments are a type of derivative contract whereby the Fund may agree to buy or sell a country&#8217;s or region&#8217;s currency at a specific price on a specific date in the future. These contracts may fall in value due to foreign market downswings or foreign currency value fluctuations. The Fund&#8217;s investment or hedging strategies may not achieve their objective. Investment in these instruments also subjects the Fund to counterparty risk.<br/><br/><b>Emerging Market Securities Risk.</b> Securities issued by foreign governments or companies in emerging market countries are more likely to have greater exposure to the risks of investing in foreign securities that are described in Foreign Securities Risk. In addition, emerging market countries are more likely to experience instability resulting, for example, from rapid changes or developments in social, political and economic conditions. Their economies are usually less mature and their securities markets are typically less developed with more limited trading activity (i.e., lower trading volumes and less liquidity) than more developed countries. Emerging market securities tend to be more volatile than securities in more developed markets. Many emerging market countries are heavily dependent on international trade and have fewer trading partners, which makes them more sensitive to world commodity prices and economic downturns in other countries, and some have a higher risk of currency devaluations.<br/><br/><b>Foreign Currency Risk.</b> The performance of the Fund may be materially affected positively or negatively by foreign currency strength or weakness relative to the U.S. dollar, particularly if the Fund invests a significant percentage of its assets in foreign securities or other assets denominated in currencies other than the U.S. dollar.<br/><br/><b>Foreign Securities Risk.</b> Investments in foreign securities involve certain risks not associated with investments in securities of U.S. companies. Foreign securities subject the Fund to the risks associated with investing in the particular country, including the political, regulatory, economic, social, diplomatic and other conditions or events occurring in the country or region, as well as fluctuations in its currency and the risks associated with less developed custody and settlement practices. Foreign securities may be more volatile and less liquid than investments in securities of U.S. companies.<br/><br/><b>Frequent Trading Risk.</b> &nbsp;The portfolio managers may actively and frequently trade investments in the Fund's portfolio to carry out its investment strategies. Frequent trading of investments increases the possibility that the Fund, as relevant, will realize taxable capital gains (including short-term capital gains, which are generally taxable to shareholders at higher rates than long-term capital gains for U.S. federal income tax purposes), which could reduce the Fund's after-tax return. Frequent trading can also mean higher brokerage and other transaction costs, which could reduce the Fund's return. The trading costs and tax effects associated with portfolio turnover may adversely affect the Fund&#8217;s performance.<br/><br/><b>Geographic Concentration Risk/Europe Risk.</b> The Fund may be particularly susceptible to economic, political, regulatory or other events or conditions affecting issuers and countries in Europe. Currency devaluations could occur in countries that have not yet experienced currency devaluation to date, or could continue to occur in countries that have already experienced such devaluations. In addition, the private and public sectors&#8217; debt problems of a single EU country can pose significant economic risks to the EU as a whole. As a result, the Fund may be more volatile than a more geographically diversified fund. If securities of issuers in Europe fall out of favor, it may cause the Fund to underperform other funds that do not concentrate in this region of the world.<br/><br/><b>Growth Securities Risk.</b> Growth securities typically trade at a higher multiple of earnings than other types of equity securities. Accordingly, the market values of growth securities may be more sensitive to adverse economic or other circumstances or changes in current or expected earnings than the market values of other types of securities. In addition, growth securities, at times, may not perform as well as value securities or the stock market in general, and may be out of favor with investors for varying periods of time.<br/><br/><b>Issuer Risk.</b> An issuer in which the Fund invests may perform poorly, and therefore, the value of its securities may decline, which would negatively affect the Fund&#8217;s performance. Poor performance may be caused by poor management decisions, competitive pressures, breakthroughs in technology, reliance on suppliers, labor problems or shortages, corporate restructurings, fraudulent disclosures, natural disasters or other events, conditions or factors.<br/><br/><b>Market Risk.</b> Market risk refers to the possibility that the market values of securities or other investments that the Fund holds will fall, sometimes rapidly or unpredictably, or fail to rise. An investment in the Fund could lose money over short or even long periods. In general, equity securities tend to have greater price volatility than debt securities.<br/><br/><b>Small- and Mid-Cap Company Securities Risk.</b> Investments in small- and mid-capitalization companies (small- and mid-cap companies) often involve greater risks than investments in larger, more established companies (larger companies) because small- and mid-cap companies tend to have less predictable earnings and may lack the management experience, financial resources, product diversification and competitive strengths of larger companies, and securities of small- and mid-cap companies may be less liquid and more volatile than the securities of larger companies.<b>Performance Information</b>The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower. Class A share performance (without sales charges) is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.<br/><br/>The performance of one or more share classes shown in the table below begins before the indicated inception date for such share class. The returns shown for each such share class include the returns of the Fund&#8217;s Class A shares (without applicable sales charges and adjusted to reflect the higher class-related operating expenses of such classes, where applicable) for periods prior to its inception date. Except for differences in annual returns resulting from differences in expenses and sales charges (where applicable), the share classes of the Fund would have substantially similar annual returns because all share classes of the Fund invest in the same portfolio of securities.<br/><br/>The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Your actual after-tax returns will depend on your personal tax situation and may differ from those shown in the table. In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs). The after-tax returns are shown only for Class A shares and will vary for other share classes. Returns after taxes on distributions and sale of Fund shares are higher than before-tax returns for certain periods shown because they reflect the tax benefit of capital losses realized on the redemption of Fund shares. After-tax returns are shown for Class A shares because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public.<br/><br/><b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b> Updated performance information can be obtained by calling toll-free 800.345.6611 or visiting columbiamanagement.com.<b>Year by Year Total Return (%)<br/>as of December 31 Each Year</b><div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleTransposedColumbiaMidCapIndexFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleNoRedemptionTransposedColumbiaMidCapIndexFund column period compact * ~</div>
<b>Summary of the Fund </b><b>Investment Objective </b>Columbia Multi-Advisor International Equity Fund (the Fund) seeks long-term capital growth.<b>Fees and Expenses of the Fund </b>This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 22 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) under <b>Sales Charge Waivers</b> beginning on page S-1.<b>Shareholder Fees (fees paid directly from your investment)</b>You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 22 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) under <b>Sales Charge Waivers</b> beginning on page S-1.50000<b>Summary of the Fund</b><b>Investment Objective</b><b>Portfolio Turnover</b>Columbia Small Cap Index Fund (the Fund) seeks total return before fees and expenses that corresponds to the total return of the Standard &amp; Poor&#8217;s (S&amp;P) SmallCap 600<sup>&#174;</sup> Index.The Fund may pay transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 20% of the average value of its portfolio.0.0575000000000<b>Fees and Expenses of the Fund</b>This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.<b>Shareholder Fees (fees paid directly from your investment)</b><b>Principal Investment Strategies</b><b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)</b>00000000.010.050.01<b>Example</b>The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example illustrates the hypothetical expenses that you would incur over the time periods indicated, and assumes that:<ul type="square"><li style="margin-left:-20px">you invest $10,000 in the applicable class of Fund shares for the periods indicated, </li></ul><ul type="square"><li style="margin-left:-20px">your investment has a 5% return each year, and</li></ul><ul type="square"><li style="margin-left:-20px">the Fund&#8217;s total annual operating expenses remain the same as shown in the Annual Fund Operating Expenses table above. </li></ul>Although your actual costs may be higher or lower, based on the assumptions listed above, your costs would be:<b>Portfolio Turnover</b>0.4024The Fund may pay transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 17% of the average value of its portfolio.<b>Principal Investment Strategies</b>0.1676Under normal circumstances, the Fund invests at least 80% of its net assets (including the amount of any borrowings for investment purposes) in common stocks that comprise the S&amp;P SmallCap 600 Index (the Index). The Fund may invest in derivatives, consisting of relevant stock index futures, to gain exposure to the small cap equity market pending direct investments in securities. <br /><br />Different common stocks have different weightings in the Index, depending on the amount of stock outstanding and the stock&#8217;s current price. In seeking to match the performance of the Index, Columbia Management Investment Advisers, LLC (the Investment Manager) attempts to allocate the Fund&#8217;s assets among common stocks in approximately the same weightings as the Index. This is referred to as a passive or indexing approach to investing. <br /><br />The Fund attempts to achieve at least a 95% correlation between the performance of the Index and the Fund&#8217;s investment results, before fees and expenses.Under normal circumstances, the Fund invests at least 80% of its net assets (including the amount of any borrowings for investment purposes) in common stocks that comprise the S&amp;P MidCap 400 Index (the Index). The Fund may invest in derivatives, consisting of stock index futures, as substitutes for the underlying securities in the Index.<br/><br/>Different common stocks have different weightings in the Index, depending on the amount of stock outstanding and the stock&#8217;s current price. In seeking to match the performance of the Index, Columbia Management Investment Advisers, LLC (the Investment Manager) attempts to allocate the Fund&#8217;s assets among common stocks in approximately the same weightings as the Index. This is referred to as a passive or indexing approach to investing.<br/><br/>The Fund attempts to achieve at least a 95% correlation between the performance of the Index and the Fund&#8217;s investment results, before fees and expenses.<b>Principal Risks</b>0.1974An investment in the Fund involves risk, including those described below. There is no assurance that the Fund will achieve its investment objective and you may lose money. The value of the Fund&#8217;s holdings may decline, and the Fund&#8217;s net asset value (NAV) and Fund share price may go down. <br /><br /><b>Derivatives Risk.</b> Losses involving derivative instruments may be substantial, because a relatively small price movement in the underlying security(ies), instrument, commodity, currency or index may result in a substantial loss for the Fund. In addition to the potential for increased losses, the use of derivative instruments may lead to increased volatility within the Fund. Derivatives will typically increase the Fund&#8217;s exposure to principal risks to which it is otherwise exposed, and may expose the Fund to additional risks, including correlation risk, counterparty risk, hedging risk, leverage risk and liquidity risk. Below is more detailed information on certain derivatives expected to be utilized by the Fund. <br /><br /><b>Derivatives Risk/Futures Contracts Risk.</b> The loss that may be incurred in entering into futures contracts may exceed the amount of the premium paid and may be potentially unlimited. Futures markets are highly volatile and the use of futures may increase the volatility of the Fund&#8217;s net asset value (NAV). Additionally, as a result of the low collateral deposits normally involved in futures trading, a relatively small price movement in a futures contract may result in substantial losses to the Fund. Futures contracts may be illiquid. Furthermore, exchanges may limit fluctuations in futures contract prices during a trading session by imposing a maximum permissible price movement on each futures contract. The Fund may be disadvantaged if it is prohibited from executing a trade outside the daily permissible price movement. Futures contracts executed on foreign exchanges may not provide the same protection as U.S. exchanges. These transactions involve additional risks, including counterparty risk, hedging risk and pricing risk. <br /><br /><b>Index Risk.</b> The Fund's value will generally decline when the performance of its targeted index declines. In addition, because the Fund may not hold all issues included in its index, it may not always be fully invested. The Fund also bears advisory, administrative and other expenses and transaction costs in trading securities, which the index does not bear. Accordingly, the Fund's performance will likely fail to match the performance of its targeted index, after taking expenses into account. It is not possible to invest directly in an index. <br /><br /><b>Issuer Risk.</b> An issuer in which the Fund invests may perform poorly, and therefore, the value of its securities may decline, which would negatively affect the Fund&#8217;s performance. Poor performance may be caused by poor management decisions, competitive pressures, breakthroughs in technology, reliance on suppliers, labor problems or shortages, corporate restructurings, fraudulent disclosures, natural disasters or other events, conditions or factors. <br /><br /><b>Market Risk.</b> Market risk refers to the possibility that the market values of securities or other investments that the Fund holds will fall, sometimes rapidly or unpredictably, or fail to rise. An investment in the Fund could lose money over short or even long periods. In general, equity securities tend to have greater price volatility than debt securities. <br /><br /><b>Small Company Securities Risk.</b> Investments in small-capitalization companies (small-cap companies) often involve greater risks than investments in larger, more established companies (larger companies) because small-cap companies tend to have less predictable earnings and may lack the management experience, financial resources, product diversification and competitive strengths of larger companies, and securities of small-cap companies may be less liquid and more volatile than the securities of larger companies. <br /><br /><b>Tracking Error Risk.</b> The Fund will not track its benchmark index perfectly and the Fund may not outperform the index. The tools that the Investment Manager uses to replicate the index are not perfect and the Fund&#8217;s performance may be impacted by the size of the Fund&#8217;s portfolio, the effectiveness of sampling techniques, transaction costs, management fees and expenses, brokerage commissions and fees, the extent and timing of cash flows in and out of the Fund and changes in the index.0.23340.1999<b>Performance Information</b>-0.50780.3798The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance has varied for each full calendar year shown. Class A share performance is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance. <br /><br />The performance of one or more share classes shown in the table below begins before the indicated inception date for such share class. The returns shown for each such share class include the returns of the Fund&#8217;s Class A shares (adjusted to reflect the higher class-related operating expenses of such classes, where applicable) for periods prior to its inception date. Except for differences in annual returns resulting from differences in expenses and sales charges (where applicable), the share classes of the Fund would have substantially similar annual returns because all share classes of the Fund invest in the same portfolio of securities. <br /><br />The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Your actual after-tax returns will depend on your personal tax situation and may differ from those shown in the table. In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs). The after-tax returns are shown only for Class A shares and will vary for other share classes. After-tax returns are shown for Class A shares because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. <br /><br /><b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b> Updated performance information can be obtained by calling toll-free 800.345.6611 or visiting columbiamanagement.com.0.13740.2-0.1593<b>Year by Year Total Return (%)<br/>as of December 31 Each Year</b>0.1784<b>Principal Risks</b><b>Best and Worst Quarterly Returns <br/>During the Period Shown in the Bar Chart</b> <br/><br/>Best&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2nd Quarter 2009&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 21.02%<br/><br/><br/>Worst&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4th Quarter 2008&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -25.03%<b>Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)</b>0.17This charge decreases over time.00<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleShareholderFeesColumbiaLargeCapEnhancedCoreFund column period compact * ~</div>
&#8220;Total annual Fund operating expenses&#8221; in the table (which includes acquired fund fees and expenses) may not match &#8220;Net Expenses&#8221; in the Financial Highlights section of this prospectus because it does not include such acquired fund fees and expenses.There is no assurance that the Fund will achieve its investment objective and you may lose money.<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualFundOperatingExpensesColumbiaLargeCapEnhancedCoreFund column period compact * ~</div>
The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance has varied for each full calendar year shown. Class A share performance is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.columbiamanagement.com800.345.6611<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleTransposedColumbiaLargeCapEnhancedCoreFund column period compact * ~</div>
<b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b>An investment in the Fund involves risk, including those described below. There is no assurance that the Fund will achieve its investment objective and you may lose money. The value of the Fund&#8217;s holdings may decline, and the Fund&#8217;s net asset value (NAV) and Fund share price may go down.<br/><br/><b>Derivatives Risk.</b> Losses involving derivative instruments may be substantial, because a relatively small price movement in the underlying security(ies), instrument, commodity, currency or index may result in a substantial loss for the Fund. In addition to the potential for increased losses, the use of derivative instruments may lead to increased volatility within the Fund. Derivatives will typically increase the Fund&#8217;s exposure to principal risks to which it is otherwise exposed, and may expose the Fund to additional risks, including correlation risk, counterparty risk, hedging risk, leverage risk and liquidity risk. Below is more detailed information on certain derivatives expected to be utilized by the Fund.<br/><br/><b>Derivatives Risk/Futures Contracts Risk.</b> The loss that may be incurred in entering into futures contracts may exceed the amount of the premium paid and may be potentially unlimited. Futures markets are highly volatile and the use of futures may increase the volatility of the Fund&#8217;s net asset value (NAV). Additionally, as a result of the low collateral deposits normally involved in futures trading, a relatively small price movement in a futures contract may result in substantial losses to the Fund. Futures contracts may be illiquid. Furthermore, exchanges may limit fluctuations in futures contract prices during a trading session by imposing a maximum permissible price movement on each futures contract. The Fund may be disadvantaged if it is prohibited from executing a trade outside the daily permissible price movement. Futures contracts executed on foreign exchanges may not provide the same protection as U.S. exchanges. These transactions involve additional risks, including counterparty risk, hedging risk and pricing risk.<br/><br/><b>Index Risk.</b> The Fund's value will generally decline when the performance of its targeted index declines. In addition, because the Fund may not hold all issues included in its index, it may not always be fully invested. The Fund also bears advisory, administrative and other expenses and transaction costs in trading securities, which the index does not bear. Accordingly, the Fund's performance will likely fail to match the performance of its targeted index, after taking expenses into account. It is not possible to invest directly in an index.<br/><br/><b>Issuer Risk.</b> An issuer in which the Fund invests may perform poorly, and therefore, the value of its securities may decline, which would negatively affect the Fund&#8217;s performance. Poor performance may be caused by poor management decisions, competitive pressures, breakthroughs in technology, reliance on suppliers, labor problems or shortages, corporate restructurings, fraudulent disclosures, natural disasters or other events, conditions or factors.<br/><br/><b>Market Risk.</b> Market risk refers to the possibility that the market values of securities or other investments that the Fund holds will fall, sometimes rapidly or unpredictably, or fail to rise. An investment in the Fund could lose money over short or even long periods. In general, equity securities tend to have greater price volatility than debt securities.<br/><br/><b>Mid-Cap Company Securities Risk.</b> Investments in mid-capitalization companies (mid-cap companies) often involve greater risks than investments in larger, more established companies (larger companies) because mid-cap companies tend to have less predictable earnings and may lack the management experience, financial resources, product diversification and competitive strengths of larger companies, and may be less liquid than the securities of larger companies, and securities of mid-cap companies may be less liquid than the securities of larger companies.<br/><br/><b>Tracking Error Risk.</b> The Fund will not track its benchmark index perfectly and the Fund may not outperform the index. The tools that the Investment Manager uses to replicate the index are not perfect and the Fund&#8217;s performance may be impacted by the size of the Fund&#8217;s portfolio, the effectiveness of sampling techniques, transaction costs, management fees and expenses, brokerage commissions and fees, the extent and timing of cash flows in and out of the Fund and changes in the index.<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleNoRedemptionTransposedColumbiaLargeCapEnhancedCoreFund column period compact * ~</div>
The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs).The after-tax returns are shown only for Class A shares and will vary for other share classes.<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualTotalReturnsColumbiaLargeCapEnhancedCoreFundBarChart column period compact * ~</div>
June 30, 2014<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAverageAnnualTotalReturnsTransposedColumbiaLargeCapEnhancedCoreFund column period compact * ~</div>
<b>Best and Worst Quarterly Returns <br/>During the Period Shown in the Bar Chart</b> <br/><br/>Best&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2nd Quarter 2009&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 26.57%<br/><br/><br/>Worst&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4th Quarter 2008&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -27.68%Year to Date return2013-03-310.1168This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months of purchase, charged as follows: 1.00% CDSC if redeemed within 12 months of purchase, and 0.50% CDSC if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.Best<b>Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)</b>2009-06-300.2102Worst2008-12-31-0.2503There is no assurance that the Fund will achieve its investment objective and you may lose money.This charge decreases over time.This charge applies to redemptions within one year of purchase, with certain limited exceptions.0.3794<b>Performance Information</b>0.22080.07140.1462<b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)</b>-0.0066-0.310.25190.25710.00580.159600000000.050000The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance has varied for each full calendar year shown. The table below the bar chart compares the Fund&#8217;s returns for the periods shown with benchmark performance.<br/><br/>Class A share performance is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The performance of one or more share classes shown in the table below begins before the indicated inception date for such share class. The returns shown for each such share class include the returns of the Fund&#8217;s Class Z shares (adjusted to reflect the higher class-related operating expenses of such classes, where applicable) for periods prior to its inception date.<br/><br/>Except for differences in annual returns resulting from differences in expenses and sales charges (where applicable), the share classes of the Fund would have substantially similar annual returns because all share classes of the Fund invest in the same portfolio of securities.<br/><br/>The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Your actual after-tax returns will depend on your personal tax situation and may differ from those shown in the table. In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs). The after-tax returns are shown only for Class A shares and will vary for other share classes. After-tax returns are shown for Class A shares because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public.<br/><br/><b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b> Updated performance information can be obtained by calling toll-free 800.345.6611 or visiting columbiamanagement.com.0.1178The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance has varied for each full calendar year shown. The table below the bar chart compares the Fund&#8217;s returns for the periods shown with benchmark performance.0.00760.00760.00760.00760.00760.00760.00760.00760.00760.00760.0076000.0025000.005000.010.010.0025This charge decreases over time.0.00380.00380.00380.00180.00480.00380.00380.00230.00380.00180.0038The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance has varied for each full calendar year shown. The table below the bar chart compares the Fund&#8217;s returns for the periods shown with benchmark performance.0.01140.00940.01390.00990.01140.01640.01240.00940.02140.02140.01392000-08-012000-08-012000-08-012000-08-012000-08-012010-09-272006-01-232012-11-082000-08-010.11020.11020.07160.12010.15880.17510.18410.17940.18140.1732<b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)</b>Other expenses have been restated to reflect contractual changes to certain fees paid by the Fund.-0.0633-0.0649-0.053-0.063-0.0594-0.0492-0.0546-0.052-0.0499-0.03690.07660.06970.06610.07490.07490.08470.08030.08310.08560.0821800.345.6611columbiamanagement.com0.07The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower.There is no assurance that the Fund will achieve its investment objective and you may lose money.<b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b>The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance has varied for each full calendar year shown. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.800.345.6611columbiamanagement.com<b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b>The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs).The after-tax returns are shown only for Class A shares and will vary for other share classes.Year to Date return2013-03-310.1051BestBest2009-09-302009-09-300.15920.1984Worst2008-12-31Worst-0.22852008-12-31-0.2553Year to Date return2013-03-310.1333<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleShareholderFeesColumbiaLargeCapIndexFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualFundOperatingExpensesColumbiaLargeCapIndexFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleTransposedColumbiaLargeCapIndexFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleNoRedemptionTransposedColumbiaLargeCapIndexFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualTotalReturnsColumbiaLargeCapIndexFundBarChart column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAverageAnnualTotalReturnsTransposedColumbiaLargeCapIndexFund column period compact * ~</div>
<b>Best and Worst Quarterly Returns <br/>During the Period Shown in the Bar Chart</b> <br/><br/>Best&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3rd Quarter 2009&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 19.84%<br/><br/><br/>Worst&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4th Quarter 2008&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -25.53%other expenses for Class R4 and Class R5 are based on estimated amounts for the Fund&#8217;s current fiscal year.0.34790.15960.12310.09960.730.0764<b>Example </b>-0.36260.36790.2605-0.0214You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 19 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) under <b>Sales Charge Waivers</b> beginning on page S-1.The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example illustrates the hypothetical expenses that you would incur over the time periods indicated, and assumes that:<ul type="square"><li style="margin-left:-20px">you invest $10,000 in the applicable class of Fund shares for the periods indicated,</li></ul><ul type="square"><li style="margin-left:-20px">your investment has a 5% return each year, and</li></ul><ul type="square"><li style="margin-left:-20px">the Fund&#8217;s total annual operating expenses remain the same as shown in the Annual Fund Operating Expenses table above.</li></ul>Although your actual costs may be higher or lower, based on the assumptions listed above, your costs would be:0.1731500000.0010.0010.0010.0010.0010.0010.00250.0100000.0010.0010.0010.00350.0010.0010.00030.00030.00030.00030.00030.00030.00480.01230.00230.00480.00230.0023The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs).The after-tax returns are shown only for Class A shares and will vary for other share classes.49625244924241546901547474742698761302691301306041280293604293293other expenses for Class R4 are based on estimated amounts for the Fund&#8217;s current fiscal year.Management fees have been restated to reflect contractual changes to the investment management fee rates. Other expenses for Class A, Class B, Class C, Class R and Class Z have been restated to reflect contractual changes to certain fees paid by the FundThere is no assurance that the Fund will achieve its investment objective and you may lose money.1995-10-101995-10-101995-10-102005-09-232011-11-162012-11-081993-12-150.17620.17560.1788The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower. Class A share performance (without sales charges) is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.0.05030.05020.05010.05150.1040.1040.1040.105349125244924242010-09-272012-08-112000-03-31800.345.66111543907415474742696761301301302691280293604293293604columbiamanagement.com<b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b>The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower.1996-10-151996-10-151996-10-152011-03-072011-11-162011-03-072012-11-081996-10-150.15960.14830.11730.16280.15910.16190.16330.15980.10060.04840.03810.03850.03730.0490.04830.04840.05090.0514708717317961261671161011420.10030.090.09210.10060.10040.10310.10450.10030.0863990970670300393517362315440129213491149520681892628547761214822822472115515001944138612131669This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months of purchase, charged as follows: 1.00% CDSC if redeemed within 12 months of purchase, and 0.50% CDSC if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.708217217961261671161011429906706703003935173623154401292114911495206818926285477610.0575000000002148228224721155150019441386121316690000000.010.050.0196116Year to Date return3003622013-03-310.0475206280.00740.00740.00740.00740.00740.00740.00740.00740.0074115513869611600000.00500.010.010.0025Returns after taxes on distributions and sale of Fund shares are higher than before-tax returns for certain periods shown because they reflect the tax benefit of capital losses realized on the redemption of Fund shares.300362520628115513860.0030.0030.0030.00120.0030.0030.00170.00120.0030.00030.00030.00030.00030.00030.00030.00030.00030.00030.01320.02070.02070.00890.01570.01070.00940.00890.0107Best2009-06-307027103109116010996911090.2657Worst2008-12-31969949649284496340300284340-0.27681257131411144938555905204935902074220824001096186713061155109613067022102109116010991961099696496492844963403002843401257111411144938555905204935902074220824001096186713061155109613060.41650.23860.08630.16760.0268-0.33780.24940.2537-0.0270.14230.07670.07190.0560.08360.12370.14780.13980.14290.14320.14350.14570.1805This charge decreases over time.0.01670.01520.0140.01720.02110.03130.02630.02890.0290.02910.03140.03550.09520.08690.08110.09340.09330.1030.09890.10180.10180.10450.10180.0952002-05-012002-05-012002-05-012002-05-012002-05-012010-09-272006-01-232012-11-082012-11-082012-11-082002-05-01This charge applies to redemptions within one year of purchase, with certain limited exceptions.<b>Portfolio Turnover </b>The Fund may pay transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 100% of the average value of its portfolio.<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAverageAnnualTotalReturnsTransposedColumbiaMidCapIndexFund column period compact * ~</div>
1The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.<b>Principal Investment Strategies </b>In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs).<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleShareholderFeesColumbiaSmallCapIndexFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualFundOperatingExpensesColumbiaSmallCapIndexFund column period compact * ~</div>
The after-tax returns are shown only for Class A shares and will vary for other share classes.<b>Year by Year Total Return (%)<br/>as of December 31 Each Year</b>Returns after taxes on distributions and sale of Fund shares are higher than before-tax returns for certain periods shown because they reflect the tax benefit of capital losses realized on the redemption of Fund shares.<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleTransposedColumbiaSmallCapIndexFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleNoRedemptionTransposedColumbiaSmallCapIndexFund column period compact * ~</div>
Under normal circumstances, the Fund invests at least 80% of its net assets (including the amount of any borrowings for investment purposes) in equity securities (including common stock, preferred stock, and depositary receipts) of established companies located in at least three countries other than the United States, including emerging market countries. The Fund invests in companies that are believed to have the potential for growth or to be undervalued. <br /><br />The Fund may also invest in derivatives, including futures, forward foreign currency contracts, other types of forwards and other derivative instruments. The Fund may invest in derivatives for both hedging and non-hedging purposes, including, for example, to seek to enhance returns or as a substitute for a position in an underlying asset. The Fund may invest in derivatives to manage the Fund&#8217;s overall risk exposure. <br /><br />In addition, under normal circumstances, the Fund uses forward foreign currency contracts in seeking to enhance returns based on fluctuations in the values of various foreign currencies relative to the U.S. dollar (the Currency Overlay Strategy). The Fund gains economic exposure to foreign currencies, through its investment in forward foreign currency contracts, comparable to the exposure that it would have had if it had bought or sold the foreign currencies directly. <br /><br />The Fund may invest in companies involved in initial public offerings, tender offers, mergers and other corporate restructuring. <br /><br />Columbia Management Investment Advisers, LLC (Columbia Management or the Investment Manager) serves as the investment manager for the Fund and will attempt to achieve the Fund&#8217;s objective by managing a portion of the Fund&#8217;s assets (the Columbia Management sleeve) and selecting one or more subadvisers to manage other sleeves independently of each other and Columbia Management. The Fund&#8217;s subadviser is Threadneedle International Limited (Threadneedle), an affiliate of the Investment Manager. The subadviser and Columbia Management use their own methodology for selecting investments. <br /><br />Each sleeve manager&#8217;s investment strategy may involve the frequent trading of portfolio securities, which may increase brokerage and other transaction costs and have adverse tax consequences.<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualTotalReturnsColumbiaSmallCapIndexFundBarChart column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAverageAnnualTotalReturnsTransposedColumbiaSmallCapIndexFund column period compact * ~</div>
<b>Principal Risks</b><div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleShareholderFeesColumbiaMidCapValueFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualFundOperatingExpensesColumbiaMidCapValueFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleTransposedColumbiaMidCapValueFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleNoRedemptionTransposedColumbiaMidCapValueFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualTotalReturnsColumbiaMidCapValueFundBarChart column period compact * ~</div>
An investment in the Fund involves risk, including those described below. There is no assurance that the Fund will achieve its investment objective and you may lose money. The value of the Fund&#8217;s holdings may decline, and the Fund&#8217;s net asset value (NAV) and Fund share price may go down. <br /><br /><b>Active Management Risk. </b>Due to its active management, the Fund could underperform its benchmark index and/or other funds with a similar investment objective. The Fund may fail to achieve its investment objective and you may lose money. <br /><br /><b>Depositary Receipts Risks. </b>Depositary receipts are receipts issued by a bank or trust company and evidence of ownership of underlying securities issued by foreign companies. Some foreign securities are traded in the form of American Depositary Receipts (ADRs). Depositary receipts involve the risks of other investments in foreign securities, including risks associated with investing in the particular country, including the political, regulatory, economic, social and other conditions or events occurring in the country, as well as fluctuations in its currency. In addition, ADR holders may not have all the legal rights of shareholders and may experience difficulty in receiving shareholder communications. <br /><br /><b>Derivatives Risk. </b>Losses involving derivative instruments may be substantial, because a relatively small price movement in the underlying security(ies), instrument, commodity, currency or index may result in a substantial loss for the Fund. In addition to the potential for increased losses, the use of derivative instruments may lead to increased volatility within the Fund. Derivatives will typically increase the Fund&#8217;s exposure to principal risks to which it is otherwise exposed, and may expose the Fund to additional risks, including correlation risk, counterparty risk, hedging risk, leverage risk and liquidity risk. Below is more detailed information on certain derivatives expected to be utilized by the Fund. <br /><br /><b>Derivatives Risk/Forward Foreign Currency Contracts Risk. </b>These instruments are a type of derivative contract whereby the Fund may agree to buy or sell a country&#8217;s or region&#8217;s currency at a specific price on a specific date in the future. These contracts may fall in value due to foreign market downswings or foreign currency value fluctuations. The Fund&#8217;s investment or hedging strategies may not achieve their objective. Investment in these instruments also subjects the Fund to counterparty risk. <br /><br /><b>Derivatives Risk/Futures Contracts Risk. </b>The loss that may be incurred in entering into futures contracts may exceed the amount of the premium paid and may be potentially unlimited. Futures markets are highly volatile and the use of futures may increase the volatility of the Fund&#8217;s net asset value (NAV). Additionally, as a result of the low collateral deposits normally involved in futures trading, a relatively small price movement in a futures contract may result in substantial losses to the Fund. Futures contracts may be illiquid. Furthermore, exchanges may limit fluctuations in futures contract prices during a trading session by imposing a maximum permissible price movement on each futures contract. The Fund may be disadvantaged if it is prohibited from executing a trade outside the daily permissible price movement. Futures contracts executed on foreign exchanges may not provide the same protection as U.S. exchanges. These transactions involve additional risks, including counterparty risk, hedging risk and pricing risk. <br /><br /><b>Emerging Market Securities Risk. </b>Securities issued by foreign governments or companies in emerging market countries are more likely to have greater exposure to the risks of investing in foreign securities that are described in Foreign Securities Risk. In addition, emerging market countries are more likely to experience instability resulting, for example, from rapid changes or developments in social, political and economic conditions. Their economies are usually less mature and their securities markets are typically less developed with more limited trading activity (i.e., lower trading volumes and less liquidity) than more developed countries. Emerging market securities tend to be more volatile than securities in more developed markets. Many emerging market countries are heavily dependent on international trade and have fewer trading partners, which makes them more sensitive to world commodity prices and economic downturns in other countries, and some have a higher risk of currency devaluations. <br /><br /><b>Foreign Currency Risk. </b>The performance of the Fund may be materially affected positively or negatively by foreign currency strength or weakness relative to the U.S. dollar, particularly if the Fund invests a significant percentage of its assets in foreign securities or other assets denominated in currencies other than the U.S. dollar. <br /><br /><b>Foreign Securities Risk. </b>Investments in foreign securities involve certain risks not associated with investments in securities of U.S. companies. Foreign securities subject the Fund to the risks associated with investing in the particular country, including the political, regulatory, economic, social, diplomatic and other conditions or events occurring in the country or region, as well as fluctuations in its currency and the risks associated with less developed custody and settlement practices. Foreign securities may be more volatile and less liquid than investments in securities of U.S. companies. <br /><br /><b>Frequent Trading Risk. &nbsp;</b>The portfolio managers may actively and frequently trade investments in the Fund's portfolio to carry out its investment strategies. Frequent trading of investments increases the possibility that the Fund, as relevant, will realize taxable capital gains (including short-term capital gains, which are generally taxable to shareholders at higher rates than long-term capital gains for U.S. federal income tax purposes), which could reduce the Fund's after-tax return. Frequent trading can also mean higher brokerage and other transaction costs, which could reduce the Fund's return. The trading costs and tax effects associated with portfolio turnover may adversely affect the Fund&#8217;s performance. <br /><br /><b>Geographic Concentration Risk. </b>The Fund may be particularly susceptible to economic, political, regulatory or other events or conditions affecting issuers and countries within the specific geographic regions in which the Fund invests. The Fund&#8217;s net asset value may be more volatile than a more geographically diversified fund. <br /><br /><b>Growth Securities Risk. </b>Growth securities typically trade at a higher multiple of earnings than other types of equity securities. Accordingly, the market values of growth securities may be more sensitive to adverse economic or other circumstances or changes in current or expected earnings than the market values of other types of securities. In addition, growth securities, at times, may not perform as well as value securities or the stock market in general, and may be out of favor with investors for varying periods of time. <br /><br /><b>Issuer Risk. </b>An issuer in which the Fund invests may perform poorly, and therefore, the value of its securities may decline, which would negatively affect the Fund&#8217;s performance. Poor performance may be caused by poor management decisions, competitive pressures, breakthroughs in technology, reliance on suppliers, labor problems or shortages, corporate restructurings, fraudulent disclosures, natural disasters or other events, conditions or factors. <br /><br /><b>Market Risk. </b>Market risk refers to the possibility that the market values of securities or other investments that the Fund holds will fall, sometimes rapidly or unpredictably, or fail to rise. An investment in the Fund could lose money over short or even long periods. In general, equity securities tend to have greater price volatility than debt securities. <br /><br /><b>Multi-Adviser Risk. </b>The Fund has multiple subadvisers. Each subadviser makes investment decisions independently from the other subadviser(s). It is possible that the security selection process of one subadviser will not complement or may conflict or even contradict that of the other subadviser(s), including making off-setting trades that have no net effect to the Fund, but which may increase Fund expenses. As a result, the Fund's exposure to a given security, industry, sector or market capitalization could be smaller or larger than if the Fund were managed by a single subadviser, which could affect the Fund's performance. <br /><br /><b>Pacific/Asia Region Risk. </b>Many of the countries in the Pacific/Asia region are considered underdeveloped or developing, including from a political, economic and/or social perspective, and may have relatively unstable governments and economies based on limited business, industries and/or natural resources or commodities. Events in any one country within the region may impact other countries in the region or the region as a whole. As a result, events in the region will generally have a greater effect on the Fund than if the Fund were more geographically diversified. This could result in increased volatility and losses within the Fund. <br /><br /><b>Quantitative Model Risk. </b>Investments selected using quantitative methods may perform differently from the market as a whole. There can be no assurance that these methodologies will enable the Fund to achieve its objective. <br /><br /><b>Small Company Securities Risk. </b>Investments in small-capitalization companies (small-cap companies) often involve greater risks than investments in larger, more established companies (larger companies) because small-cap companies tend to have less predictable earnings and may lack the management experience, financial resources, product diversification and competitive strengths of larger companies, and securities of small-cap companies may be less liquid and more volatile than the securities of larger companies. <br /><br /><b>Special Situations Risk. </b>Securities of companies that are involved in an initial public offering or a major corporate event, such as a business consolidation or restructuring, may present special risk because of the high degree of uncertainty that can be associated with such events. Securities issued in initial public offerings often are issued by companies that are in the early stages of development, have a history of little or no revenues and may operate at a loss following the offering. It is possible that there will be no active trading market for the securities after the offering, and that the market price of the securities may be subject to significant and unpredictable fluctuations. Investing in special situations may have a magnified effect on the performance of funds with small amounts of assets. <br /><br /><b>Value Securities Risk. </b>Value securities are securities of companies that may have experienced, for example, adverse business, industry or other developments or may be subject to special risks that have caused the securities to be out of favor and, in turn, potentially undervalued. The market value of a portfolio security may not meet the portfolio manager's perceived value assessment of that security, or may decline in price, even though the portfolio manager(s) believe(s) the securities are already undervalued. There is also a risk that it may take longer than expected for the value of these investments to rise to the portfolio manager&#8217;s perceived value. In addition, value securities, at times, may not perform as well as growth securities or the stock market in general, and may be out of favor with investors for varying periods of time.<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAverageAnnualTotalReturnsTransposedColumbiaMidCapValueFund column period compact * ~</div>
There is no assurance that the Fund will achieve its investment objective and you may lose money.<b>Performance Information </b><b>Summary of the Fund</b><b>Investment Objective</b>Columbia Mid Cap Value Fund (the Fund) seeks long-term capital appreciation.<b>Fees and Expenses of the Fund</b>This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 18 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) under <b>Sales Charge Waivers</b> beginning on page S-1.The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower. Class A share performance (without sales charges) is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance. <br /><br />The performance of one or more share classes shown in the table below begins before the indicated inception date for such share class. The returns shown for each such share class include the returns of the Fund&#8217;s Class A shares (without applicable sales charges and adjusted to reflect the higher class-related operating expenses of such classes, where applicable) for periods prior to its inception date. Except for differences in annual returns resulting from differences in expenses and sales charges (where applicable), the share classes of the Fund would have substantially similar annual returns because all share classes of the Fund invest in the same portfolio of securities. <br /><br />The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Your actual after-tax returns will depend on your personal tax situation and may differ from those shown in the table. In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs). The after-tax returns are shown only for Class A shares and will vary for other share classes. Returns after taxes on distributions and sale of Fund shares are higher than before-tax returns for certain periods shown because they reflect the tax benefit of capital losses realized on the redemption of Fund shares. After-tax returns are shown for Class A shares because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. <br /><br /><b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future. </b>Updated performance information can be obtained by calling toll-free 800.345.6611 or visiting columbiamanagement.com.You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 18 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) under <b>Sales Charge Waivers</b> beginning on page S-1.50000The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower. Class A share performance (without sales charges) is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.<b>Shareholder Fees (fees paid directly from your investment)</b><b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)</b>800.345.6611This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months of purchase, as follows: 1.00% if redeemed within 12 months of purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.This charge applies to redemptions within one year of purchase, with certain limited exceptions.This charge decreases over time.columbiamanagement.com<b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future. </b><div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleShareholderFeesColumbiaMarsicoInternationalOpportunitiesFund column period compact * ~</div>
The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower.<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualFundOperatingExpensesColumbiaMarsicoInternationalOpportunitiesFund column period compact * ~</div>
<b>Example</b><div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleTransposedColumbiaMarsicoInternationalOpportunitiesFund column period compact * ~</div>
<b>Year by Year Total Return (%)<br/>as of December 31 Each Year</b><div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleNoRedemptionTransposedColumbiaMarsicoInternationalOpportunitiesFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualTotalReturnsColumbiaMarsicoInternationalOpportunitiesFundBarChart column period compact * ~</div>
0.34080.17620.13820.24950.1421-0.4704<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAverageAnnualTotalReturnsTransposedColumbiaMarsicoInternationalOpportunitiesFund column period compact * ~</div>
0.31130.087-0.13390.1791<b>Best and Worst Quarterly Returns <br/>During the Period Shown in the Bar Chart</b> <br/><br/>Best&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2nd Quarter 2009&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 25.94%<br/><br/><br/>Worst&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4th Quarter 2008&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -24.41%Year to Date return472222222013-03-3119372831140.0303Best3521271502142009-06-300.2594815291349509Worst2008-12-31-0.2441<b>Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012) </b>472222221937283114352127150214815291349509The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example illustrates the hypothetical expenses that you would incur over the time periods indicated, and assumes that:<ul type="square"><li style="margin-left:-20px">you invest $10,000 in the applicable class of Fund shares for the periods indicated,</li></ul><ul type="square"><li style="margin-left:-20px">your investment has a 5% return each year, and</li></ul><ul type="square"><li style="margin-left:-20px">the Fund&#8217;s total annual operating expenses remain the same as shown in the Annual Fund Operating Expenses table above.</li></ul>Although your actual costs may be higher or lower, based on the assumptions listed above, your costs would be:<b>Portfolio Turnover</b>The Fund may pay transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 36% of the average value of its portfolio.0.36<b>Principal Investment Strategies</b>Under normal circumstances, the Fund invests at least 80% of its net assets (including the amount of any borrowings for investment purposes) in equity securities of companies that have market capitalizations in the range of the companies in the Russell Midcap Value Index (the Index) at the time of purchase (between $438 million and $30.4 billion as of May 31, 2013), that the Fund&#8217;s investment manager believes are undervalued and have the potential for long-term growth.<br/><br/>The Fund may invest up to 20% of its total assets in foreign securities. The Fund normally invests in common stocks and also may invest in real estate investment trusts. The Fund may from time to time emphasize one or more economic sectors in selecting its investments.<br/><br/>The investment manager combines fundamental and quantitative analysis with risk management in identifying value opportunities and constructing the Fund's portfolio.<b>Principal Risks</b>An investment in the Fund involves risk, including those described below. There is no assurance that the Fund will achieve its investment objective and you may lose money. The value of the Fund&#8217;s holdings may decline, and the Fund&#8217;s net asset value (NAV) and Fund share price may go down. <br /><br /><b>Active Management Risk.</b> Due to its active management, the Fund could underperform its benchmark index and/or other funds with a similar investment objective. The Fund may fail to achieve its investment objective and you may lose money. <br /><br /><b>Foreign Securities Risk.</b> Investments in foreign securities involve certain risks not associated with investments in securities of U.S. companies. Foreign securities subject the Fund to the risks associated with investing in the particular country, including the political, regulatory, economic, social, diplomatic and other conditions or events occurring in the country or region, as well as fluctuations in its currency and the risks associated with less developed custody and settlement practices. Foreign securities may be more volatile and less liquid than investments in securities of U.S. companies. <br /><br /><b>Issuer Risk.</b> An issuer in which the Fund invests may perform poorly, and therefore, the value of its securities may decline, which would negatively affect the Fund&#8217;s performance. Poor performance may be caused by poor management decisions, competitive pressures, breakthroughs in technology, reliance on suppliers, labor problems or shortages, corporate restructurings, fraudulent disclosures, natural disasters or other events, conditions or factors. <br /><br /><b>Market Risk.</b> Market risk refers to the possibility that the market values of securities or other investments that the Fund holds will fall, sometimes rapidly or unpredictably, or fail to rise. An investment in the Fund could lose money over short or even long periods. In general, equity securities tend to have greater price volatility than debt securities. <br /><br /><b>Quantitative Model Risk.</b> Investments selected using quantitative methods may perform differently from the market as a whole. There can be no assurance that these methodologies will enable the Fund to achieve its objective. <br /><br /><b>Real Estate-related Investment Risk.</b> Investment in real estate investment trusts (REITs) and in securities of other companies (wherever organized) principally engaged in the real estate industry subjects the Fund to, among other risks, risks similar to those of direct investments in real estate and the real estate industry in general, including risks related to general and local economic conditions, possible lack of availability of financing and changes in interest rates or property values. REITs are entities that either own properties or make construction or mortgage loans, and also may include operating or finance companies. The value of REIT shares is affected by, among other factors, changes in the value of the underlying properties owned by the REIT, by changes in the prospect for earnings and/or cash flow growth of the REIT itself, defaults by borrowers or tenants, market saturation, decreases in market rates for rents, and other economic, political, or regulatory matters affecting the real estate industry, including REITs. REITs and similar non-U.S. entities depend upon specialized management skills, may have limited financial resources, may have less trading volume in their securities, and may be subject to more abrupt or erratic price movements than the overall securities markets. REITs are also subject to the risk of failing to qualify for tax-free pass-through of income. Some REITs (especially mortgage REITs) are affected by risks similar to those associated with investments in debt securities including changes in interest rates and the quality of credit extended. <br /><br /><b>Sector Risk.</b> At times, the Fund may have a significant portion of its assets invested in securities of companies conducting business in a related group of industries within an economic sector, including the financial services sector. Companies in the same economic sector may be similarly affected by economic, regulatory, political or market events or conditions, making the Fund more vulnerable to unfavorable developments in that economic sector than funds that invest more broadly. The more a fund diversifies its investments, the more it spreads risk and potentially reduces the risks of loss and volatility. Because the Fund&#8217;s portfolio managers may invest significantly in the financial services sector, the Fund may be more susceptible to the particular risks of the financial services sector than if the Fund were invested in a wider variety of companies in unrelated industries. <br /><br /><b>Small- and Mid-Cap Company Securities Risk.</b> Investments in small- and mid-capitalization companies (small- and mid-cap companies) often involve greater risks than investments in larger, more established companies (larger companies) because small- and mid-cap companies tend to have less predictable earnings and may lack the management experience, financial resources, product diversification and competitive strengths of larger companies, and securities of small- and mid-cap companies may be less liquid and more volatile than the securities of larger companies. <br /><br /><b>Value Securities Risk.</b> Value securities are securities of companies that may have experienced, for example, adverse business, industry or other developments or may be subject to special risks that have caused the securities to be out of favor and, in turn, potentially undervalued. The market value of a portfolio security may not meet the portfolio manager's perceived value assessment of that security, or may decline in price, even though the portfolio manager(s) believe(s) the securities are already undervalued. There is also a risk that it may take longer than expected for the value of these investments to rise to the portfolio manager&#8217;s perceived value. In addition, value securities, at times, may not perform as well as growth securities or the stock market in general, and may be out of favor with investors for varying periods of time.There is no assurance that the Fund will achieve its investment objective and you may lose money.<b>Performance Information</b>The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower. Class A share performance (without sales charges) is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance. <br /><br />The performance of one or more share classes shown in the table below begins before the indicated inception date for such share class. The returns shown for each such share class include the returns of the Fund&#8217;s Class A shares (without applicable sales charges and adjusted to reflect the higher class-related operating expenses of such classes, where applicable) for periods prior to its inception date. Except for differences in annual returns resulting from differences in expenses and sales charges (where applicable), the share classes of the Fund would have substantially similar annual returns because all share classes of the Fund invest in the same portfolio of securities. <br /><br />The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Your actual after-tax returns will depend on your personal tax situation and may differ from those shown in the table. In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs). The after-tax returns are shown only for Class A shares and will vary for other share classes. After-tax returns are shown for Class A shares because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. <br /><br /><b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b> Updated performance information can be obtained by calling toll-free 800.345.6611 or visiting columbiamanagement.com.The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower. Class A share performance (without sales charges) is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.800.345.66110.17310.16280.12510.17740.04760.040.0388Other expenses for Class A, Class B, Class C, Class K, Class R, Class W, Class Y and Class Z have been restated to reflect contractual changes to certain fees paid by the Fund0.10120.09220.0873other expenses for Class R4 and Class R5 are based on estimated amounts for the Fund&#8217;s current fiscal year.2000-05-312000-05-312000-05-31columbiamanagement.com<b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b>The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower.<b>Year by Year Total Return (%)<br />as of December 31 Each Year</b><b>Best and Worst Quarterly Returns <br/>During the Period Shown in the Bar Chart</b> <br/><br/>Best&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3rd Quarter 2009&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 20.74%<br/><br/><br/>Worst&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4th Quarter 2008&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -27.98%<b>Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)</b>The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs).The after-tax returns are shown only for Class A shares and will vary for other share classes.0.05750000000000Year to Date return0.010.050.01000000002013-03-310.11080.10440.07810.12080.16060.18530.18110.17610.18310.18350.18010.18440.18280.17320.1392-0.0619-0.0655-0.0521-0.0614-0.0474-0.058-0.0495-0.0532-0.0483-0.0505-0.0482-0.0477-0.0484-0.0369Best0.00660.00660.00660.00660.00660.00660.00660.00660.00660.00660.00662009-09-300.0640.05720.05540.06240.06390.07360.07190.06770.07310.07310.07340.07070.07310.08210.21810.00250.010.01000.005000.0025001992-06-031992-06-031992-06-031993-06-071992-06-172010-09-272011-03-072006-01-232012-11-082012-11-082010-09-272011-03-071991-12-020.00290.00290.00290.00080.00380.00290.00290.00130.00290.00080.00290.0120.01950.01950.00740.01040.01450.00950.00790.0120.00740.0095Worst2008-12-31-0.23896906982987610614897811227697934912612237331459303252381237303119712521052411574792525439660411525194620802275918127117351166978145591811666901987619810614897811227697934612612237331459303252381303237119710521052411574792525439660411525194620802275127191817351166978145591811662001-11-202001-11-202001-11-202001-11-202001-11-202010-09-272011-03-072006-01-232012-11-082012-11-082010-09-272009-07-152001-11-200.0980.09670.06520.10620.14640.17090.16870.1630.16560.16580.16470.16980.16840.1851-0.001-0.0023-0.0011-0.00070.00340.0130.01160.00840.0110.0110.0110.01310.01340.03790.08970.08120.07670.0880.08810.09740.09670.09350.09630.09630.09630.09750.0990.10630.36530.20640.1502The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.0.16740.0738In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs).-0.4178The after-tax returns are shown only for Class A shares and will vary for other share classes.0.3225Returns after taxes on distributions and sale of Fund shares are higher than before-tax returns for certain periods shown because they reflect the tax benefit of capital losses realized on the redemption of Fund shares.0.2293-0.04280.1649Best2009-09-300.2074Worst2008-12-31-0.2798Year to Date return2013-03-310.1243<b>Summary of the Fund</b><b>Investment Objective</b>Columbia Small Cap Value Fund II (the Fund) seeks long-term capital appreciation.<b>Fees and Expenses of the Fund</b>This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 19 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) <b>under Sales Charge Waivers</b> beginning on page S-1.You may qualify for sales charge discounts if you and an immediate family member invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, in the Choosing a Share Class section beginning on page 19 of the Fund&#8217;s prospectus and in Appendix S to the Statement of Additional Information (SAI) <b>under Sales Charge Waivers</b> beginning on page S-1.50000<b>Shareholder Fees (fees paid directly from your investment)</b><b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)</b><b>Example</b>The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example illustrates the hypothetical expenses that you would incur over the time periods indicated, and assumes that:<ul type="square"><li style="margin-left:-20px">you invest $10,000 in the applicable class of Fund shares for the periods indicated,</li></ul><ul type="square"><li style="margin-left:-20px">your investment has a 5% return each year, and</li></ul><ul type="square"><li style="margin-left:-20px">the Fund&#8217;s total annual operating expenses remain the same as shown in the Annual Fund Operating Expenses table above.</li></ul>Although your actual costs may be higher or lower, based on the assumptions listed above, your costs would be:<b>Portfolio Turnover</b>The Fund may pay transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 42% of the average value of its portfolio.0.42<b>Principal Investment Strategies</b>Under normal circumstances, the Fund invests at least 80% of its net assets (including the amount of any borrowings for investment purposes) in equity securities of companies that have market capitalizations in the range of the companies in the Russell 2000 Value Index at the time of purchase (between $14 million and $5.8 billion as of May 31, 2013) that the Fund&#8217;s investment manager believes are undervalued and have the potential for long-term growth.<br/><br/>The Fund may invest up to 20% of its total assets in foreign securities, including depositary receipts. The Fund normally invests in common stocks and also may invest in real estate investment trusts. The Fund may from time to time emphasize one or more economic sectors in selecting its investments.<br/><br/>The investment manager combines fundamental and quantitative analysis with risk management in identifying investment opportunities and constructing the Fund&#8217;s portfolio.This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months of purchase, as follows: 1.00% if redeemed within 12 months of purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.This charge decreases over time.This charge applies to redemptions within one year of purchase, with certain limited exceptions.Other expenses for Class A, Class B, Class C, Class R and Class Z have been restated to reflect contractual changes to certain fees paid by the Fundother expenses for Class R4, Class R5 and Class Y are based on estimated amounts for the Fund&#8217;s current fiscal year.&#8220;Total annual Fund operating expenses&#8221; in the table (which includes acquired fund fees and expenses) may not match &#8220;Net Expenses&#8221; in the Financial Highlights section of this prospectus because it does not include such acquired fund fees and expenses.<b>Principal Risks</b>An investment in the Fund involves risk, including those described below. There is no assurance that the Fund will achieve its investment objective and you may lose money. The value of the Fund&#8217;s holdings may decline, and the Fund&#8217;s net asset value (NAV) and Fund share price may go down.<br/><br/><b>Active Management Risk.</b> Due to its active management, the Fund could underperform its benchmark index and/or other funds with a similar investment objective. The Fund may fail to achieve its investment objective and you may lose money.<br/><br/><b>Depositary Receipts Risks.</b> Depositary receipts are receipts issued by a bank or trust company and evidence of ownership of underlying securities issued by foreign companies. Some foreign securities are traded in the form of American Depositary Receipts (ADRs). Depositary receipts involve the risks of other investments in foreign securities, including risks associated with investing in the particular country, including the political, regulatory, economic, social and other conditions or events occurring in the country, as well as fluctuations in its currency. In addition, ADR holders may not have all the legal rights of shareholders and may experience difficulty in receiving shareholder communications.<br/><br/><b>Foreign Currency Risk.</b> The performance of the Fund may be materially affected positively or negatively by foreign currency strength or weakness relative to the U.S. dollar, particularly if the Fund invests a significant percentage of its assets in foreign securities or other assets denominated in currencies other than the U.S. dollar.<br/><br/><b>Foreign Securities Risk.</b> Investments in foreign securities involve certain risks not associated with investments in securities of U.S. companies. Foreign securities subject the Fund to the risks associated with investing in the particular country, including the political, regulatory, economic, social, diplomatic and other conditions or events occurring in the country or region, as well as fluctuations in its currency and the risks associated with less developed custody and settlement practices. Foreign securities may be more volatile and less liquid than investments in securities of U.S. companies.<br/><br/><b>Issuer Risk.</b> An issuer in which the Fund invests may perform poorly, and therefore, the value of its securities may decline, which would negatively affect the Fund&#8217;s performance. Poor performance may be caused by poor management decisions, competitive pressures, breakthroughs in technology, reliance on suppliers, labor problems or shortages, corporate restructurings, fraudulent disclosures, natural disasters or other events, conditions or factors. <br/><br/><b>Market Risk.</b> Market risk refers to the possibility that the market values of securities or other investments that the Fund holds will fall, sometimes rapidly or unpredictably, or fail to rise. An investment in the Fund could lose money over short or even long periods. In general, equity securities tend to have greater price volatility than debt securities.<br/><br/><b>Quantitative Model Risk.</b> Investments selected using quantitative methods may perform differently from the market as a whole. There can be no assurance that these methodologies will enable the Fund to achieve its objective.<br/><br/><b>Real Estate-related Investment Risk.</b> Investment in real estate investment trusts (REITs) and in securities of other companies (wherever organized) principally engaged in the real estate industry subjects the Fund to, among other risks, risks similar to those of direct investments in real estate and the real estate industry in general, including risks related to general and local economic conditions, possible lack of availability of financing and changes in interest rates or property values. REITs are entities that either own properties or make construction or mortgage loans, and also may include operating or finance companies. The value of REIT shares is affected by, among other factors, changes in the value of the underlying properties owned by the REIT, by changes in the prospect for earnings and/or cash flow growth of the REIT itself, defaults by borrowers or tenants, market saturation, decreases in market rates for rents, and other economic, political, or regulatory matters affecting the real estate industry, including REITs. REITs and similar non-U.S. entities depend upon specialized management skills, may have limited financial resources, may have less trading volume in their securities, and may be subject to more abrupt or erratic price movements than the overall securities markets. REITs are also subject to the risk of failing to qualify for tax-free pass-through of income. Some REITs (especially mortgage REITs) are affected by risks similar to those associated with investments in debt securities including changes in interest rates and the quality of credit extended.<br/><br/><b>Sector Risk.</b> At times, the Fund may have a significant portion of its assets invested in securities of companies conducting business in a related group of industries within an economic sector, including the financial services sector. Companies in the same economic sector may be similarly affected by economic, regulatory, political or market events or conditions, making the Fund more vulnerable to unfavorable developments in that economic sector than funds that invest more broadly. The more a fund diversifies its investments, the more it spreads risk and potentially reduces the risks of loss and volatility. Because the Fund&#8217;s portfolio managers may invest significantly in the financial services sector, the Fund may be more susceptible to the particular risks of the financial services sector than if the Fund were invested in a wider variety of companies in unrelated industries.<br/><br/><b>Small Company Securities Risk.</b> Investments in small-capitalization companies (small-cap companies) often involve greater risks than investments in larger, more established companies (larger companies) because small-cap companies tend to have less predictable earnings and may lack the management experience, financial resources, product diversification and competitive strengths of larger companies, and securities of small-cap companies may be less liquid and more volatile than the securities of larger companies.<br/><br/><b>Value Securities Risk.</b> Value securities are securities of companies that may have experienced, for example, adverse business, industry or other developments or may be subject to special risks that have caused the securities to be out of favor and, in turn, potentially undervalued. The market value of a portfolio security may not meet the portfolio manager's perceived value assessment of that security, or may decline in price, even though the portfolio manager(s) believe(s) the securities are already undervalued. There is also a risk that it may take longer than expected for the value of these investments to rise to the portfolio manager&#8217;s perceived value. In addition, value securities, at times, may not perform as well as growth securities or the stock market in general, and may be out of favor with investors for varying periods of time.There is no assurance that the Fund will achieve its investment objective and you may lose money.<b>Performance Information</b>The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower. Class A share performance (without sales charges) is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.<br/><br/>The performance of one or more share classes shown in the table below begins before the indicated inception date for such share class. The returns shown for each such share class include the returns of the Fund&#8217;s Class A shares (without applicable sales charges and adjusted to reflect the higher class-related operating expenses of such classes, where applicable) for periods prior to its inception date. Except for differences in annual returns resulting from differences in expenses and sales charges (where applicable), the share classes of the Fund would have substantially similar annual returns because all share classes of the Fund invest in the same portfolio of securities.<br/><br/>The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Your actual after-tax returns will depend on your personal tax situation and may differ from those shown in the table. In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs). The after-tax returns are shown only for Class A shares and will vary for other share classes. After-tax returns are shown for Class A shares because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public.<br/><br/><b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b> Updated performance information can be obtained by calling toll-free 800.345.6611 or visiting columbiamanagement.com.The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower. Class A share performance (without sales charges) is shown in the bar chart because Class A shares have at least ten calendar years of performance and Class A shares are the most common share class across the Columbia Funds complex that are available for investment by the general public. The table below the bar chart compares the Fund&#8217;s returns (after applicable sales charges) for the periods shown with benchmark performance.The bar chart shows how the Fund&#8217;s Class A share performance (without sales charges) has varied for each full calendar year shown. If the sales charges were reflected, returns shown would be lower.The after-tax returns shown in the table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.In addition, the after-tax returns shown in the table do not apply to shares held in tax-deferred accounts such as 401(k) plans or Individual Retirement Accounts (IRAs).The after-tax returns are shown only for Class A shares and will vary for other share classes.<b>The Fund&#8217;s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.</b>800.345.6611columbiamanagement.com<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleShareholderFeesColumbiaMulti-AdvisorInternationalEquityFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualFundOperatingExpensesColumbiaMulti-AdvisorInternationalEquityFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleTransposedColumbiaMulti-AdvisorInternationalEquityFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleNoRedemptionTransposedColumbiaMulti-AdvisorInternationalEquityFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualTotalReturnsColumbiaMulti-AdvisorInternationalEquityFundBarChart column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAverageAnnualTotalReturnsTransposedColumbiaMulti-AdvisorInternationalEquityFund column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleShareholderFeesColumbiaSmallCapValueFundII column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualFundOperatingExpensesColumbiaSmallCapValueFundII column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleTransposedColumbiaSmallCapValueFundII column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleExpenseExampleNoRedemptionTransposedColumbiaSmallCapValueFundII column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAnnualTotalReturnsColumbiaSmallCapValueFundIIBarChart column period compact * ~</div>
<div style="display:none">~ http://www.columbiamanagement.com/role/ScheduleAverageAnnualTotalReturnsTransposedColumbiaSmallCapValueFundII column period compact * ~</div>
other expenses for Class R5 are based on estimated amounts for the Fund&#8217;s current fiscal year.<b>Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)</b><b>Year by Year Total Return (%)<br/>as of December 31 Each Year</b><b>Best and Worst Quarterly Returns <br/>During the Period Shown in the Bar Chart</b> <br/><br/>Best&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3rd Quarter 2009&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 21.81%<br/><br/><br/>Worst&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4th Quarter 2008&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -23.89%<b>Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)</b>This charge applies to redemptions within one year of purchase, with certain limited exceptions.This charge decreases over time.This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months of purchase, as follows: 1.00% if redeemed within 12 months of purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.&#8220;Total annual Fund operating expenses&#8221; in the table (which includes acquired fund fees and expenses) may not match &#8220;Net Expenses&#8221; in the Financial Highlights section of this prospectus because it does not include such acquired fund fees and expenses.Other expenses for Class A and Class Z have been restated to reflect contractual changes to certain fees paid by the FundOther expenses for Class A, Class B, Class C, Class K, Class R, Class W, Class Y and Class Z have been restated to reflect contractual changes to certain fees paid by the FundThis charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months of purchase, charged as follows: 1.00% CDSC if redeemed within 12 months of purchase, and 0.50% CDSC if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.This charge decreases over time.This charge applies to redemptions within one year of purchase, with certain limited exceptions.These fees and expenses and the example below reflect the expenses of both the Fund and Columbia International Value Master Portfolio (the Master Portfolio).Management fees have been restated to reflect contractual changes to the investment advisory fee rates.Other expenses for Class A, Class B, Class C, Class I, Class R and Class Z have been restated to reflect contractual changes to certain fees paid by the Fund and other expenses for Class R4 and Class R5 are based on estimated amounts for the Fund's current fiscal year. Year to Date return as of March 31, 2013: 4.18% This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months of purchase, charged as follows: 1.00% CDSC if redeemed within 12 months of purchase, and 0.50% CDSC if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.This charge decreases over time.This charge applies to redemptions within one year of purchase, with certain limited exceptions.Other expenses for Class W and Class Z have been restated to reflect contractual changes to certain fees paid by the Fund and other expenses for Class A, Class B, Class C, Class K and Class R are based on estimated amounts for the Fund's current fiscal year.Columbia Management Investment Advisers, LLC and certain of its affiliates have contractually agreed to waive fees and/or to reimburse expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses, and extraordinary expenses) until June 30, 2014, unless sooner terminated at the sole discretion of the Fund's Board of Trustees. Under this agreement, the Fund's net operating expenses, subject to applicable exclusions, will not exceed the annual rates of 1.41% for Class A, 2.16% for Class B, 2.16% for Class C, 0.96% for Class I, 1.26% for Class K, 1.66% for Class R, 1.41% for Class W, and 1.16% for Class Z. Year to Date return as of March 31, 2013: 3.21% This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months after purchase, as follows: 1.00% if redeemed within 12 months of purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.This charge decreases over time.This charge applies to redemptions within one year of purchase, with certain limited exceptions.This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months of purchase, as follows: 1.00% if redeemed within 12 months of purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.This charge decreases over time.This charge applies to redemptions within one year of purchase, with certain limited exceptions.Other expenses for Class A, Class B, Class C, Class R, Class W and Class Z have been restated to reflect contractual changes to certain fees paid by the Fund and other expenses for Class R4 and Class R5 are based on estimated amounts for the Fund's current fiscal year.Columbia Management Investment Advisers, LLC and certain of its affiliates have contractually agreed to waive fees and/or to reimburse expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses, and extraordinary expenses) until June 30, 2014, unless sooner terminated at the sole discretion of the Fund's Board of Trustees. Under this agreement, the Fund's net operating expenses, subject to applicable exclusions, will not exceed the annual rates of 1.10% for Class A, 1.85% for Class B, 1.85% for Class C, 0.66% for Class I, 1.35% for Class R, 0.85% for Class R4, 0.71% for Class R5, 1.10% for Class W and 0.85% for Class Z.Other expenses for Class A, Class B, Class C, Class W and Class Z have been restated to reflect contractual changes to certain fees paid by the Fund and other expenses for Class R5 are based on estimated amounts for the Fund's current fiscal year.Columbia Management Investment Advisers, LLC and certain of its affiliates have contractually agreed to waive fees and/or to reimburse expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses, and extraordinary expenses) until June 30, 2014, unless sooner terminated at the sole discretion of the Fund's Board of Trustees. Under this agreement, the Fund's net operating expenses, subject to applicable exclusions, will not exceed the annual rates of 1.18% for Class A, 1.93% for Class B, 1.93% for Class C, 0.78% for Class I, 0.83% for Class R5, 1.18% for Class W and 0.93% for Class Z.Year to Date return as of March 31, 2013: 9.27% This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months of purchase, as follows: 1.00% if redeemed within 12 months of purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.Other expenses for Class A, Class B, Class C, Class R and Class Z have been restated to reflect contractual changes to certain fees paid by the Fund and other expenses for Class R4 are based on estimated amounts for the Fund's current fiscal year. Year to Date return as of March 31, 2013: 10.52% Management fees have been restated to reflect contractual changes to the investment management fee rates.Year to Date return as of March 31, 2013: 7.75%This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months of purchase, as follows: 1.00% if redeemed within 12 months of purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.This charge applies to redemptions within one year of purchase, with certain limited exceptions.Management fees have been restated to reflect contractual changes to the investment management fee rates.Other expenses have been restated to reflect contractual changes to certain fees paid by the Fund.Columbia Management Investment Advisers, LLC and certain of its affiliates have contractually agreed to waive fees and/or to reimburse expenses (excluding certain fees and expenses, suc